[meangreeny]

FInd a local engine builder you trust - preferably performance builder who can recommend heads / cam etc for what you want to do. I would suggest that you do not go more than .30 over with the 351w or you may have cooling issues. The casting number on the old Ford block you will be looking for will begin as follows: C9 = 1969, D0 (I think) = 1970, D1 = 1971, D2 = 1972 so on and so forth. You should be able to find an old 351w easily with these numbers. Sounds like you have the same issue we have here in Colorado. I re-built a 1971 351w for my Cobra replica which made it so I only had to qualify for the emissions required for the year of the Engine block. Had I purchased a new crate motor it would have been next to impossible to register the car in CO. Prior to a re-build of an old engine make sure to have the block magnafluxed (not sure on spelling) to insure block is in good shape. My engine is 10.5:1 compression. I have Edlebrock Performer intake, 600 carb, ARP Rod bolts, MSD 6AL & dist, race valve job head work and Erson Performer Cam etc. My 351 SB was build by ADC racing in Ft Collins, CO and runs outstanding. I estimate I have between 350 and 385 HP but want to dyno the car to make sure. Good luck.