[allways]

hi, I pulled a sb 427 with aluminum heads out of my 1955 chev 210 and put it into my 1972 c10 I put in new spark plugs changed distributor and replaced carb base plate gaskets this is a new crate motor with zero miles on it ran like a dream in the 1955 but runs like crap in pickup cant figure out why. other than the things listed above I did put anti seize on the plugs do you think this could be my problem?