I'm about to make my Suburban "MY" Suburban. I found a shop that can do the work and they didn't say I was crazy so thats a huge plus. so I'm thinking about putting a 496(one I'm looking at says it has 690HP) but I may just stick with a 454. but its going to be carb(dual and a scoop) and its a 93 so TBI. will doing the swap effect the trans shifting. the guy at the shop said they could put anything under my hood and have it run but that I should look into this before getting a motor.