Swapped in a 74 454 that I added a stock vortec cam to.
Using 92 454 throttle body. computer is 7747 prom is ANTY, but is a hypertec. I got the number for the prom using my scan tool.

The problem is the idle speed ends up at 1000-1100. I do the whole min set procedure, my book tells me 700 in gear. When I finish the procedure and restart idle speed is slightly higher than min, with IAC counts in the 35-40 range. A few restarts later, the idle creeps (1000-1100) up even though IAC is at 0. And it is completely seated. There are no vac leaks and I have tried backing the timing down from 4 deg and it doesnt really help.