[jschiller]

If its a C3AE-J its a 2x4 low riser made for any FE except the so-called hi riser heads. So it potentially fits any 390-427-428 depending on the heads installed and also depending on how much of a port mis-match you can stand.

Keep in mind all the various intake port sizes used on FE heads, there were many variations in the iron heads. This usually results in a mis-match between the intake port and the head port. A small mismatch can be ignored or porting can be done, depending on how much time, money or effort you want to expend.