so who has actually done this swap? I think I'm puting the 355 I have in my K5 into my 89 Burb now. But I want to get a 87+ Ebrock performer since it has the rear water crossover I need for my heater setup. So who has modified a 87+ intake to fit older heads? I know people say oh just slot them, but I've never seen it done or talked to someone who has.