Steve, looks like you are doing an awesome job on that restoration! Just for the record, my completely stock Blazer 4x4 had straight down rams horns like the other fellows are saying. I did take them off though to put on the Vette ram horns with the 2.5" exhaust, and the stove pipe/ heat exchanger fit those perfectly. Not trying to be picky, and you may not have put them on yet, but you also need the spark plug wire shields/protectors as well. Also, that is an HEI distributor (but you know that). Can't wait to see the final product!