WRXB215

So, you hear nothing while transmitting and then, when you let go of the PTT, you hear a burst of noise? (Squelch tail)
Are you testing by transmitting on one of the radios while the other is close nearby so you can hear it?
Transmitting on one while listening on another that’s close by can cause something called “desense”.  What happens is that the listening radio goes deaf to the repeater because it’s overwhelmed by the RF power of the nearby transmitter. 
Try giving the receiving radio to someone at the other end of the house (or even further).

That’s what generally foils the whole idea not to mention repeaters, including cross-band types, are prohibited in MURS.
A variation of the cross-band idea is an in-band spilt frequency operation. Many radios can be programmed to receive on one frequency and transmit on another within the same band using an arbitrarily frequency offset.
The idea would require the GMRS user to transmit on a legal GMRS frequency and receive on a frequency in the Ham 70cm band. 
The Ham radio user would then transmit on a legal 70cm simplex frequency, which is programmed into the above GMRS radio for receive only, and receive on the GMRS transmit frequency programmed in the GMRS radio.
Nether radio requires modifications nor dual band operation. Just the ability to program in spilt UHF frequencies with an arbitrarily offset.
This operation in not legal either for the prior mentioned rules. The Ham station shall only contact other stations in the Amateur service. Also it could fall under the general prohibition to engage in one-way communications since the other station is NOT in the Amateur service. 

I wanted to point this scenario out before somebody dreams this case up and tries a convoluted argument this would pass under the rules. It won’t. 

It's a free country. If you don't want to listen to linked repeaters, then you do not. If you want to listen to rag chews and join in, then you do. Ride your own bike and let others decide what do they want.
 

Look at masts at DXEngineering.com. 
If you were only going 10 feet I would look at top rail for chain link fence. It’s available up to 20 feet long. 
However, if you have a rotator you really need to stay under the weight limit of your thrust bearing. I don’t have any idea what that is. You might be back to your stand-off idea. You too could end up with a tower like this: 

Yeah! Don't be so "standoffish!" 🤣
Sorry for the bad joke, I couldn't resist.  😉

Why don’t you answer?

As a Ham you’re limited to ONLY making contact with other stations which are licensed and operating in the amateur service of the US, or of the country the station is located in. Obviously GMRS is NOT a Part 97 service. As a Ham you should know this. I would recommend you get a copy of Part 97 rules and throughly read it. It’s pointless to waste time on something you can easy research yourself.

The reason it’s done is the elimination of the heavy, bulky and expensive cavity filters required for an in-band repeater. This applies to analog radios.
The filters are required because the RX and TX frequencies are close together. Without sufficient isolation the transmitter will overload the receiver such that it effectively become deaf. Remember the receiver is feeding every it hears to the transmitter at the same time.
A cross-band repeater the frequencies are space far enough apart that a far simpler and cheaper filter can provide the isolated required.

No, it isn’t. For a 50 watt radio you would probably need at least a 15 amp power supply. 

https://chirp.danplanet.com/projects/chirp/wiki/MemoryEditorColumns
Read up on tone mode. This really helped me.

Yeah! Don't be so "standoffish!" 🤣
Sorry for the bad joke, I couldn't resist.  😉

https://chirp.danplanet.com/projects/chirp/wiki/MemoryEditorColumns
Read up on tone mode. This really helped me.

You can build a better antenna than any commercially manufactured one if you are handy. Search for homebrew ham antennas, and use a calculator to resize the elements for your preferred frequency.
https://www.hamuniverse.com/wb3aywcollinear.html
I built a 4-element collinear vertical antenna from copper tubing. It took a bit of tuning to get it perfect, but it was worth the effort. Total cost was about $60, and antenna gain is about 7 dBd (9 dBi). The difference between that and my dipole is amazing.

Try snipping a little bit off the end of your antenna and see if that helps. Really though, have you tested to see if your HH isn't being desensed by the repeater?

I am sensing many confuckulations.

So are you trying to do simplex on 467? That’s not allowed except for Fixed Stations (don’t ask; there’s an entire thread on the topic.)
According to the regulations, transmitting on 467 main frequencies by a mobile station is only permitted when transmitting through a repeater, which would require receiving on 462 MHz.
Maybe the baked in rules don’t allow trying to communicate on 467 simplex. I’d be surprised, but not shocked. 

Or not. I wouldn’t say I’ve been here a long time but I still agree with the sentiment that GMRS is intended for shorter distances and more user friendly for family and friends. As @OffRoaderX mentioned it is stated as much by the FCC. I also see nothing wrong with seeing how far you can reach, I think we all do that (my personal best on GMRS to date,70 miles. Yesterday 😊). As for linking GMRS repeaters across vast distances, I see no need to use up GMRS frequencies for this. Different uses for different radio services.
Like @marcspaz I have also made friends over GMRS and this encouraged me to also get my ham license, or duel citizenship as @WRQC527 calls it (I like that 👍). That way I can play in both sandboxes. I see them as different. I would encourage those that want more than GMRS is intended for to do the same. Take a test, join a broader service and link away. Just my thoughts.

I wouldn't worry about it, bud... just use the radio however you enjoy.  I have met 25-30 new people over the GMRS service that I am becoming friends with.  People I would have likely never met if it wasn't for strangers being willing to have some minor conversation with a stranger on the other end. 
 
Again, just my opinion, while I have an opinion... people should be able to enjoy the service however they like.  We just need to be considerate to others and stay inside the rules and intent of the service, because as a civilized society, that is what we have agreed to do. 

We are bumping this thread for members to review Post # 1.
 
PLEASE use the Private Discussion Area  for any posts that include repeater access codes or frequencies. The Private Discussion Area can not be seen by search engine bots or non registered viewers.
 
The staff will attempt to move any post that contains this type of information into the Private Discussion Area - however, we need your help in placing posts with sensitive information in the proper place to start with.
 
Thank You.

sadly, I am guilty of this... but I am getting better. 

My personal opinion, we don't need Ham Radio 2.0 or Ham Lite. 
I think there MUST be a place for people who just want to talk to their family and friends without a bunch of bureaucratic steps and unnecessary roadblocks.  FRS is a wonderful service for exactly that.  For families that may need a bit more (maybe coverage of the family farm, for example), amateur radio may be too strict for the family needs but GMRS is a great next step.  The reduced audience is considered a plus, too.
 
 
Linking repeaters over the internet and tying up limited channel allocation is a bad idea, but I love seeing how far I can reach... radio to radio.

Nothing wrong with that, and we all do it, but that is very different from "rag chewing", aka talking for several minutes at a time without unkeying the mic, for hours on end, about nothing - basically, talking to hear themselves talk, or just to try and demonstrate to everyone how smart they think they are, how many fancy and expensive radios they own, how long they have been in "the business" (implying they cannot possibly be wrong about whatever they are talking about), and listing how many different jobs they've had working on complicated and technical things ... You know, just like the long-winded, overly-complicated, multi-paragraph off-topic posts that you you see in this forum every day..
 

I know... But Grindr? Thank God there's no affiliate link below. Then I'd really start to wonder.

You absolutely must have the cable terminated using a load that has the same impedance as the cable. A good 50 ohm dummy load is perfect. The next best thing is a tuned antenna, where the SWR is under 1.5:1. 

You can measure it in at least two different ways. The easiest is to place a wattmeter at each end of the cable and transmit. Then compare the readings on the two meters. (Or take two measurements with a single meter at each end of the cable). If using this method you must have the cable terminated when measuring before the cable, ideally with a 50 ohm dummy load. When measuring at the far end of the cable you would have a dummy load attached to the antenna output on the wattmeter. 
The other way is with a two port RF network/antenna analyzer. Connect the cable between the two ports and measure the insertion loss. 
In YouTube search for measuring coax loss. 
Here’s one video:
https://youtu.be/YnT1MA1wbSQ?si=ehBaLDnNKwg62xJ1