Senior Tech Team
Join Date: Feb 2013
Location: Lloydminster, Alberta
Re: Beef up a stock 454
First thing to do is the exhaust. 1.75"x3" headers and a 2.5" or 3" mandrel bent exhaust. 3" if in the future he is going to build a 500hp + engine. Good straight through mufflers like Dynomax Ultra Flow.
Performer rpm air gap intake, and for a carb pretty much any 750. If you are swapping to taller gears, a vacuum secondary holley based carb or 750 street demon. Have a look at the FST line of carbs for a holley based.
Then I would do a converter change to a tight 10" in the 2500 stall range, and tune the timing curve.
A cam change would be what I would do after all of the above.