Zach,
I agree that line insulation should be helpful. My fuel pump went out on my big block a little over a week ago so I decided that while I was at it I should make a few changes to help with the heat and potential vapor lock since the 502 is more prone. It's taken a bit of time and effort, but here's what I've done:
1) Replaced all fuel lines with fuel injection hose.
2) Insulated all fuel lines with heatshield sleeves
http://www.heatshieldproducts.com/autom ... d-sleeving
3) Covered the bottom of the tank with heatshield lava barrier
http://www.heatshieldproducts.com/autom ... ava-shield
4) Replaced the Holley Red Pump with a Holley Blue pump and Aeromotive regulator with tank return.
http://www.summitracing.com/parts/aei-13351 The return line set up should result in less wear and tear on my pump (and internal pump produced heat) and as well hopefully keep the fuel temperature lower through better fuel circulation and having less fuel sitting in the lines to be heated.
5) Added a digital fuel pressure gauge and inline sensor just before the front (main) inflow port into the Holley double pumper carb.
https://www.dynotunenitrous.com/store/s ... roduct=130 The gauge is small and can be easily located and they appear to be a good company. (Marv showed me one on his bike and recommended).
6) And of course replaced the filter between tank and pump.
I finished getting everything done and back together on Saturday and my fuel pressure was sitting at a perfect 7 psi with and without engine running. I started her up yesterday afternoon for an inaugural ride and my pressure was at 10-12 pounds and couldn't be adjusted back down with the regulator. After checking it out with an external pressure gauge, taking the regulator apart to make sure there weren't any product filings or issues inside (there weren't).............I put it back together with a hose from the return port on the regulator running to an empty gas can instead of the return line to the tank. Viola - pressure adjustable and holding at 7 psi. It appears the return line elbow with riser tube fashioned from a brake line is restricting the flow and back pressuring into the regulator. So, today I'll be redoing that elbow with better internal diameter tube and expect all will be good.
Sorry for the long message - but I guess what I'm saying is that while you're at it, there are a number of options to consider that may help reduce your vapor lock challenges. At least that's the result I'm looking for with the modifications I've made..........
Cheers,
Mike