Quote: How much more is involved with the relocation of the valve position? I imagine you need to slot the existing bolt holes and possibly bush them? How much is gained by doing this over leaving it as-is? I'm collecting parts for a 470" build and interested in any tweaks that can net a few extra hp
The valve relocation requires flycutting for proper radial clearance and restoring the proper angle to the bottom of the valve relief. In this case I had to adjust the pocket 2.25* from stock.
Yes I did elongate the holes and spot faced them as well. No bushing was required. In fact I think I could get away with .025" more offset for a total of .125".
I would not hesitate to say that this was worth 20-25 hp alone. May not seem like much but the camshaft is really not all that large in duration. I ran this same cam in 2009 with tunnel ram and solid lifters and struggled to make 680 hp. For me that kind of put it into perspective. J.Rob
