I was just curious, whether or not parts are interchangable from 350 to 455. Example,,, Alternator arm., Top right pulley, Powersteering pump.??? Bought a 455, but a few things are missin. actually boughta 74 buick 455.
455 swap questions There is a small but helpful article on this topic at www.buickperformance.com I have not done the swap myself but I am using the article as a shopping list.
Buick 350/TH350 to Buick 455/TH400 swap the specific address is http://www.buickperformance.com/conversi.htm
You will find the pullies don't line up, you will have to shim them. The crank pulley is larger on the 455 and the waterpump pulley smaller. The alternator arm is longer on the 455 but the A/c brackets are the same and the power steering pump may work, sometimes the belt hits the water pump and sometimes it doesn't. I have done this three times now.
if you call ta performance they have all that stuff upstairs and they can hook you up at a price more than reasonable.
