These are the most desirable small block Factory heads that anyone could ever want for their 340 every body and their mama knows about the pedigree...only bad problems is hardened valve seats that don't agree with no lead gas
well... take 'em to a machine shop have 'em put in. Right? or is there an issue where that cant be done...I actually have 1 set of X and 2 sets of Js one with 1.88s on ewith 2.02s.
