I have a 98 rcsb with a 4.3 and have been planning an ls6 t56 combo. I would like to tackle the swap first with a cheap used 4.8 or 5.3 just to get a LS based motor in the truck with the bugs worked out while keeping the factory auto. In the mean time I can start collecting ls6 parts with the assumption that a future upgrade to an ls6 would be easier.
My question is what the perfect year, make and model engine to start with is, knowing that an upgrade is on the horizon. I want my ls6 motor to have corvette coil covers for no other reason than I like the way it looks, does and truck, van or any other alternator bracket arrangement fit the vette coil covers. Also just to double check (assumptions you know) can I take out a 4.8 liter and slide an ls6 in and get a computer retune and I’m off?