--Son and I are planning on installing a 350/400Turbo/posi setup > that I have in the barn this winter. First, welcome to the group. There are a lot of Gremlin people on here with a vast knowledge of Gremlins that love to talk bout em. Next, I dropped in a 350 sbc with a 2 speed pwrglide a few months ago, so if you need any help, I'll try my best. Im getting ready to have it tubbed with a narrowed 10 bolt and 18.5 inch mickey thompsons as well as painting and doing some upholstry work. Third, youll be getting a visit from a spirit named Bart that hates Chevy motors in Gremlins, pay him no attention, he really loves em, but wont admit it. And last, Im not sure bout the price on the 77X. Its more about what you think is the worth! Gremlins arent cosidered a big collecters item, except for us diehards, so its more just a personnal value. Ive seen everything from $100.00 junks to $20,000.00 prostreets. Have fun. Rod