I am looking at a motor, the heads are stamped 46 and there is an X on it at one end of the head and then it looks like GM9 at the other end and above that a small N, the block is stamped 481988(from what i can tell) and 400 is also stamped on the block. Can anyone tell what this is from the info listed? What are the performance numbers if you do have any info? David.
http://FirstGenFirebird.org/show/closeup.mv?CarID=571 If i don't get this car back on the road soon i'm gonna go postal! On a quest for FGF knowledge 1968 Pontiac Firebird Convertible 1969 Oldsmobile Cutlass "S" Convertible *Sold*
