With a 54.5 mm cam and lobe lifts of .400 or less, leaving a base circle of 1.375 or greater.
With a lifter diameter of 1.5 plus there is no need, to put a roller cam followers. The small percentage gain is not worth the big outlay. This type parts and other are a lot of fad bits and pieces going around, in the drag racing world we call that trick of the week parts, stick with the basics, cylinder heads and cam profiles now working with flat tappet. There is much more big gains that are available in the cylinder head . I see some of head work that Ray Little at RayMac is developing, and the work that John Russin at Buddha power has done for quite some time. These heads are expensive, but if you will forget the trick of the week parts like rollercams, pumps over 750cc, ceramic lifters, and others extreme parts that do have a place currently .Now when these trucks level out in a few years and the field is like Pro Stock, meaning 10 to 20 hp is a deciding factor, then you can go to trick of the week parts. Ray recently redid a cylinder head that was done buy one of the big diesel vendors The port job looked nice, but did not flow air . This was a 24 valve and after the redo on the port work the truck picked up from 478 hp 850 tq up to 670hp 1310 tq I don’t know the particulars, and I assume that the added air flow allowed the tune to run more fuel and make more power I do know that Ray worked with them on this cylinder head , also this head was not a manifold removal head.
Finnis use alsou Latin alphabet. Cyrillic is russian alphabet