Hey guys! I am looking to do a SBC swap on my 91. I have been looking at Marks adapters and trying to decide if I just want to swap the engine or do the engine and transmission. Will the 80 series transmission hold up to the stock 350? I do not plan on a lot of performance mods as I am loooing for reliability coupled with some extra power over what I have with the I6. It would save a ton of money not swapping in a different transmission, but I do not want to be rebuilding it repeatedly either. Thanks in advance!