hello, a used picco 21 big block. this has great compression say 95% so will last ya along time. this is a direct drop in for any tmaxx truck. this has been oiled for storage so may need a glow plug. will also need tuned to your elevation of course. all motors come with no warranty. thank you.usps raised the shipping prices, so please dont blame my star rating! thank you. be sure to look at my other auctions for more goodies!! 5 stars please! ask any questions you may have i will try to help. thank you. i will not sell you junk!