Ok im planning on installing a gm847 cam into my 95 formula m6. Im planning on using the proform self aligning aluminum 1.6 ratio roller rockers and ls7 lifters. my question is what size pushrods do i need and what springs do i need. any help would be appreciated.

 

I successfully used Proforms on a much milder application but would not use them for that.

I also fail to understand why everyone doing a cam swap has to spend the money on LS7 lifters when stockers are fine and why they have to buy cams that are too big so maybe I am the one who doesn't know what I am doing. That cam is bigger than what I am running, hell it is bigger than what most guys with 355s run. Should be left to strokers.

 

^^I'd have to agree, stock lifters can live a very long abused life.