well let my know what your looking at cash wise and we will go from there i have my stock alt so if i have to swap out and ship mine first so you can stay running that can be done also lmk hit me with a pm if your still interested
gm is it a GMC or chevy not sure if there is a difference in the 2 i can do pods for you what are you looking to spend i also have a 400.2 and a 1200.1 not really 4 sale but if the price is right