Getting ready to buy a truck with a 4.3 in it, I already have a 5.3 from a 2005 Avalanche. I have read up on everything and am ready to do the swap soon. Just wanted to know if I can keep my stock torque converter that is in the 4.3 truck or do I need one that came from a truck with the 5.3, also will the stock 4.3 radiator be enough to cool the truck?? Trying to keep costs down as much as possible yet still have nice reliable build.