I am building a gen V and I am switching the heads over to Mark IV dart merlin The Gen V doesn't have an adjustable valvetrain I was wondering since I will have on now if I have to use Mark IV pushrods?

What I have found out if you put a mark IV head on a V,VI, a IV has an adjustable valve train while the V,VI doesn't. You have to use Mark IV pushrods because they are longer 8.285in/9.256ex compared to V/VI 8.171in/9.151ex. Just something I found out last night.

Thanks