@ MBHD & EFIDIY, Thanks for the information.
Would anybody know of a good used 2bbl intake manifold? Or even have a picture of one? I tried to find any sort of picture or video of the chev 250's in South America, and I seen some 2 bbl intake manifold; wich might have been gm but not sure. Could not find anything fuel injected. Any info on this would be awsesome.
If I was to find a good Gm 2bbl intake how much would it be worth? How much would a gm 292 exhaust manifold be worth?
For a stock build 250 (9.3-9.4 comp-ratio & pg trans)should a 292 ex-man be used or the cast iron headers?