well here goes 455cu engine. code# Y4 3,,,,,yes this is origina; eng,the car has surprisingly little polltion control PCV,gas vapor recovery and thats all .
my problem is y4 3 code is on my build sheet and eng blk. yet doesnt show in any vin searches and im looking still , any 70s Grand prixs guys with info is appreitiated?
thnxs,,,perry