Sidthing 10 Report post Posted December 13, 2009 I have several sets of 390GT heads. For those of you who don't know, there are three types of exhaust manifold bolt patterns. 8 bolt, one hole on top and one on bottom of each exhaust port, most FE heads. 16 bolt for some 428s I think just the cobra jets, 4 bolt holes around each exhaust port. Then these puppies, 14 bolt 390 GT heads, 4 bolt holes around the front and rear exhaust ports, and 3 around the two center exhaust ports. Not all 390s had these heads, just the 390 GTs, the 390 GT was a special engine, the cam was used for the cobra jet that eclipsed it performance wise. I don't have the casting dates, because I never cared about concourse restorations, but if you are interested I can get them for you. Please don't request the casting dates if you have no intentions on buying them. Make offer. Quote Share this post Link to post Share on other sites
