All good info; two other things to consider-- do you have low vacuum or limited firewall space? -hydroboost is great if you don't have much engine vacuum or want a small unit compared to big canister. Actually, there are low bucks approaches--go over to 67-72chevytrucks.com and do a search-recent thread on how to set one up using NAPA parts for $150.
Nothing wrong with drums on the rear.
