[Steve C.]

Ray- I had a 700 hp combo based on a 400 block that we were making about a 1000 hp with nitrous and everything was fine. It ran real well, but I knew I needed a new stronger block to last. For the most part everything inside is coming out of the old combination except for new larger diameter pistons and a slightly larger camshaft. Why not????.... the old combination did not have very many passes on it and I would expect all the parts to be fine, including the Crower billet crank & Crower billet rods. And I would expect others to agree.

Again, to me on my limited retirement income using the $525 lifters and $320 pushrods is a big deal. Roller lifters can typicaly be used again with no problems, and these are special .200 offset.

On the base circle thing... the new cam is a solid roller from Lunati and is basicly a copy of the old Ultradyne roller that cam out of the engine. The change was made for more exhaust duration due to the nitrous use. It has a .4267 lobe lift with 1.65 & 1.6 rockers. Duration is only 283/294 @.050. The base circle is within .010" on both cams.