I have a 1989 RS that has been converted to a 355 with a T 56 transmission. The blocking heads are out of a 1997 for fuel delivery. I’ve deleted the factory center and I’m using a 4 to 7 psi electric pump on the frame rail. The car runs great for about 10 minutes then it will shut off and I have to set for 10 minutes to restart it once restart it. It’ll only run a mile or so before it does the same thing over and over again any thoughts?

 

What’s a factory center and blocking heads ? Is this carb swap ?

 

sorry, I was trying to say that the pump in the tank has been deleted and I’m running a 4 to 6 psi electric pump. The block and heads are out of a 97 5.7 the carburetor is an elder Brock 1406

 

When it dies does the acellerator pump still squirt ? Could be fuel related or icm

 

I’m wondering if I need a return line or if I’m having a vapor lock issue since I’m dead heading at the carburetor from the electric pump on the frame I don’t have any kind of return and the fuel line runs up pretty close to the headers

 

When it fails to start does adding a bit of fuel directly into the carburetor bores allow it to start and run for a few seconds?

 

^That is the question that needs to be answered.

 

Seems like most people join, don't answer questions then ghost.