Hey Kirin These "Crate Engines" use Scat lifters. I have been selling "my formula" Scat engines (1914cc and 2275cc) for years now and have never had a problem with lifters.
We have just focused this formula into a marketable product and instead of offering every combo in the world (very confusing for Customers) it's been my opinion for a while now that there are really only 2 engine sizes worth building.
1914cc just because the barrel thickness is almost as thick as the 90.5s and it is the biggest engine you can build on a 69 crank. This engine with 1.1:1 rockers works well with a re-jetted 34mm pict carb and a 4 into 1 header.
2275cc this is just a stroked out 1914 using an 82 stroke crank. If put together for street daily driver use the 2275, using the "B" style stroker pistons, is the same width as a 1600 wich with a set of single HD valve springs allows the use of stock aluminum pushrods as well!
All Our crate engines have the same cam shaft in them and are set up for daily driving street or offroad use.
Gary.