This one is for the engine builders:
I've run into a problem in assembling my 540 Dart - block BBC. The problem is that the lifter bosses (unmachined) on the Dart block are very tall compared to my Merlin III block and my new Comp "R" Series (Hyd. Roller) lifters won't work due to the tie bars bottoming out on the block just before the roller makes contact w/ the cam (bottom of the lobe). My Crane Roller lifters are slightly better (longer) but are VERY close and I'm concerned that when the lifters are popping up an down at high RPM's the end of the tie bar will bind on the block and break. Does anybody know if there are some taller hydraulic roller lifters out there that can work?
BTW: My cam is a custom Comp with .652" and .646" lift intake and exhaust respectively. I can't believe that the base circle of the cam is so low that there isn't a lifter on the market that can't work? Pulling the engine apart to have the lifter bosses machined down wouldn't be an option that I would consider at this stage.
If necessary I'll have to resort to a solid roller setup because I know that there are .300" taller solid roller lifters available from Comp Cams.
Any thoughts/suggestions would be greatly appreciated. Thx

PM RMbuilder he has the Morels on the shelf. The body is .300" longer and will clear the Dart blocks no problem.

Isky red zones are .300 longer and an excellent quality lifter.
Thanks, Cam-shaft.

X2, Word is that Morel makes them for Isky.

We build Morel's engines and I am a WD for his AWESOME lifters!

Yes and that FE will runnnnnn..... Dean have you found the Morels to fit the Dart blocks no problem?

Thanks Guys. I've since found out from the Comp Cams Catalog that the right part # for the .300" taller Pro - Magnum hydraulic roller lifter is 8954-16. Does anybody know about these? If so, how do they compare to the Morels. I hadn't heard of Morel lifters until very recently. Thx.

Morels are at the top of the game. IMO the best on the market today. I recently spent lots of time researching the best Hyd roller lifter for my new build and they are a cut above from what I ran across. Also talking to engine builders revealed the same thing. I found out Morel supplies lifters for Isky, Lunati, Doug Herbert Performance.

It seems they use better quality materials and have a better heat treating process than others. They are also priced right in line with others on the market.

I'm also an LS1 engine builder and Morel is the #1 lifter for these engines.

My Morels....

What does a set of Morels cost?

My SBC were $450.