Heres the thing just got great deal--454-rollerrocks, billet valvecovers,doublepumper,edelbrockrpm,hookerheader s,7qt milodon, msd dist.6AL,wires, starter,pulleys waterpump.... real thick heavy duty edelbrock timing cover, all ARP, stall conv. 350 turbo,chrome pan, shiftkit, flexplate, holley electric fuel pump, was running everthing looks pretty new, ran really good, sounded like it had a big cam.
got it all for only 1500, what a deal! Having problems looking up holley code-4781-6 ( OR G) double pumper, mech secondaries, electric choke, four corner idle. Also block codes are T0320XAA and 14D15446 any ideas, says 7.4 on the side-454 is this a 4th gen. block? is it a good block? how do i identify heads? any help is great, this is my first big block.