I have a problem with my Holley 600 (4160)

same on my 318, it is a vapor lock issue, of you had a elec. fuel pump it wouldnt be a problem, as of now i have the edelbrock adapter from a spreadbore manifold to a square bore card (able 3/4" made of alum)... but i still bad the problem with an equivalent phenololic spacer, its the heat soak on the carb and lines that vapor locks it, its right about 30-45 minutes where it sees most of its trouble restarting....