I recently swapped my strait 6 200ci for a 302 and ran dual exhaust. The car ran great for the first couple weeks no problems. But now it seems to vapor lock after the car heats up and runs for approx 30 to 40 min and just shuts off. I have a clear fuel filter by the pump and after it shuts down it appears no fuel is inside the filter. I have rerouted the fuel line in the engine compartment to go down farther away from the headers that i put in and also heat wrapped the fuel line in the engine compartment area. The car still stalls out after getting warm. Any suggestions?? I heard possibly rerouting the entire fuel line away from exhaust would fix the problem or an electric fuel pump rather than the mechanical.

 

Fix the problem, not the symptom. Going to an electric pump isn't fixing it, its trying to fix the symptom of no gas in the line/high heat by applying more pressure. Moving the line away from all heat sources fixes the problem.

IMO

 

I figured that would be the most logical way to go about it. Would you happen to know if the pre bent lines for the v8 would work around the new dual exhaust or am i going to need to get custom lines bent??

 

You can bend your own lines very easily. Just buy a roll of copper line and borrow/free-rent a line bender from any car parts store. It shouldn't take you too long.

 

Very common problem when you go from 6cyl to V8, electric pump fixed same problem on my 72, also the lines ran different between the V8 and 6cyl on my 72, suggest checking gas lines out of a V8 mustang at local show

 

Ignore electric fuel pump and put a phenolic spacer between intake and carb. Will cost you a tenner, about 15 mins work and that might fix it already

 

Online parts stores have pre bent lines for the 6 cyl and the 8 cyl. I am wondering if there is anyone out there that has installed the line for the 8cyl and knows it it rerouts the line away from the newly installed dual exhaust.

 

seriously try a spacer first. I had that problem as well. The intake would heat the carb, the carb would get so hot that it would start boiling fuel, fuel filter would run empty, car stall.
phenolic spacer cured that for me. helps as well when you park a hot car for 5 minutes and have trouble starting it then

 

The fuel filter all the way down by the pump is bone dry though, wouldnt there be some fuel in there if the carb was the problem??

 

It's not really the carb. It's as you say the heat. But at carb. Let me see if I can find an old video