Clean install. The TMV71 is an excellent radio, as is the TMD710. I own both of these units.
One nice thing about the TMD710 and the TMV71 is that you can use either faceplate with either transceiver. In my situation, I installed the TMD710 in my 80, because I wanted to take advantage of APRS functionality. I installed a TMV71 in my daily driver. The TMV71 uses an RJ11 on the input side of the faceplate, and the TMD710 uses an RJ45 connection. I simply ran an RJ45 CAT6 cable in my daily driver, which now allows me to have full APRS functionality by using the TMD710 faceplate in whatever vehicle I happen to be driving.
Here's a shot of TMD710 coupled with my TS480SAT installed on a Lido mount.
Over the weekend I ripped out my factory center console and replaced it with a Smitty-Bilt box, installing the TMD710 transceiver inside of it. I also installed a switchcraft RJ45 pass through plate for the microphone.
As for an antenna, I really like the Diamond NR770HB. It's approximately 44" long, and has a coil on it, so it endures abuse pretty well. I originally had it on my ARB, but I relocated it to my roof rack. Here are a couple of pictures of the antenna: