I Have a1991 CHevy W/T 2wd that has a blown 4.3L v6 in it currently. I have been told that all is needed to swap a 350 in are new TB injecters and brain box. Will the Engine mounts match up with a 350? and will the radiator be able to support a 350 or will that need to be changed? Any ways the truck is in very good shape and has true duel exhaust on it which brings up another question? Will shorty headers on a 350 or the stock exhaust manifold match up with the exhaust tubing that was built for the 4.3L? Any advice or answers would be appreciated.

 

complete mount's, radiator ,and most of the exhaust depending on the competency of your muffler shop ,or get new part's and put them on your self . it should not be to bad .

 

ok i ask about the exhaust because it already has a true duel exhaust and didnt want to mess with it if i have to. I have been told that a 5.7 will bolt in place of a 4.3 and that they use the same mounts but that the brainbox woudl need to be changed out along with the injectors. Im just trying to get as much info as possible before trying this swap.