Yes, you can use solid liftters on hyd cams. But, you need to remember that you'll have to set 'em just as you would if the cam was solid. In other words you can't put any preload on the solid lifters. They must be set with some lash.
But, many of the solid cam lobes are too aggressive for use with hyd lifters. The solid lobes have a different design than the hyd lobes.
Don't know who makes the comp lifters. But, Paul Carter posted on the PY site that the comp lifters are the only ones that have the oil band in the correct location for a Pontiac. He builds lots of Pontiac engines. He said that all the other HR lifters he's seen are Chevy lifters, with Pontiac link bars, and the oil band is about 1/4" too low. He just grinds a simple groove down from the lifter bore oil hole 1/4". This allows the Chevy lifters to oil properly in Pontiac engines. He mentions using Hylift Johnson lifters.
More about the CC lifters. This has been discussed a lot @ PY. According to the info in this thread, those old CC 857-16 lifters, which had so many failures were replaced, maybe last year, with better quality lifters. On the box, the part # is 857M-16 The CC tech said they were made by Shaver, which I never heard of. According to what I can find, CC still uses the 857-16 part #. But, the M is included in the part # on the box.
