Well, I'm considering running a hydraulic flat tappet in the 360/380 Magnum crate engine I bought. WHY? Because nobody seems to have cam cores left.
20-614-9 Comp Cam- Delivery mid May so I phoned. Not mid May. No cam cores. Were supposed to be delivered March 13th, never showed.
Howards 711915 or 770055-12? No cam cores. No idea when
Lunati 20200715? Nope
Hughes 0814ALN-10 said they don't have cam cores and don't know if they will come in 3 weeks or 6 months.

Welllllllll?? I have a brand new 268H Comp I have on the shelf that I could run until cam cores appear magically. 6 months or a year, wouldn't matter.
Lifters (would a regular lifter put enough oil out the top for the rocker tip?) (Or Jeep application) could be sourced. Only other issue would be pushrods, and Edelbrock 9656 are 7.625/7.63 inches long, they say oiling YES and they are in stock. MoPar conversion pushrods P5007477 were 7.625 and same diameter.
Can I run the LA hydraulic flat tappet in the Magnum engine? Anybody done it??

I have the engine still assembled, if necessary I could have a really crappy running 035 @ .050 highway geared slug until cams came in, but if I could run the flat tappet until then I would.