I'd like to get some feedback on how much others are spending to do the LS1swap into their chevy trucks . Of course , most of the people I've spoken with about this think I'm F'n crazy! Why would anyone spend $4 grand on an 11 year old truck when you can get something new ? ! Or buy an engine from a Transam that's obviously been dogged (this assumes that all sports cars have been driven hard ) ? I try to tell them that I'll have something unique and that 's better than your average bear . I estimate that I'll spend between $4500 and $5000 . I got the engine and trans with harness and computer for $2200 with about 80,000 miles . It runs great ( I drove the car before it was removed ) and the motor oil and transmission fluid look great . I know that I probably could've gotten a lower mileage engine if I'd had the time to look around more , but I didn't even know I was going to be doing this 6 weeks ago and now it's almost ready to start up (the old 4.3 died on april 4th) . I was undecided for 2 weeks about what to do with the truck . I only got the engine and installed it last weekend . I think I've made pretty good progress for a newbie .