my 350 before i toasted some internal parts i was getting 17mpg driveing 75mph. That is with a stock 350 exhaust trottle body spacer. so i should be able to get 18-19 if i had a vortec truck. i know that the 4.8 would get 22 but i just don't know if the cost of the swap is worth it, when theres so much more to the swap and alot can go wrong. i already know that it will cost me $1,075 for the tune and wiring harness. also motor and mounts will bring it to another 1,000. that brings my total to $2,075 then these all the new hoses and fuel lines. also a/c relocation, which is $640. also i will need a new fuel pump which i found out is over $300. So this could run me $3,500 once done. Then i would have to rebuild my tranny at least i think i would.


If i had the money it wouldn't be a problem i would just do the swap no questions asked, but when i can have a new motor for less money that is the clear choice.

also to add to it i hit a dear and that is how the engine over heated, also that too care of the bumper, grill, a/c condensor, radiator, and all the lights. it also damaged the radiator core support. which all this will run me about $800 with the best prices i could find.

if anyone can help so this wouldn't be so expensive the would be great but as far as i can tell it won't be cheap.