Has anyone used the pro-flow or the LT4 valves in the LT1 head? I realize that the seats have to be changed, but I was wondering wether or not it made any sense to go through the cost and how would the pro-flows last? Has anyone tried this? Thanks 93ZTed

 

yeah. If you stick with a 2.0" valve you dont need to change seats. They are better than the stock valves and should take much more of a beating.

The valves will last if the valve job and valvetrain are up to par.