I did remove the TBI system. I wanted a lot better performance and the experts told me no one made a really good performing intake manifold for the TBI. I bought a Holley 680 CFM TBI but never installed it on the old engine. Your's being a 2500, is probably a 350 factory engine...mine was a 305. The old engine ran perfectly, but just didn't give me the performance I wanted. This new 350 HO crate engine runs really well. Thanks for the comment on my truck...let's see a pic of your's!!!
Nice '88! I am also restoring a 1988 Silverado. Mine is a C2500 blue on blue.Looks like you put a carb on yours. Did you remove the Throttle Body Injection?