Solid lifter input

PAW used to sell those in a Milodon box, and they were marketed as “light weight” lifters.
It sounded good to me......and in the mid-80’s I tried them on a Racer Brown STX-19(.530 lift) in a 440 block.
That was my first solid lifter cam.
Oil pressure gauge barely came up off the peg.

I swapped to some of the normal smooth sided lifters...... oil pressure restored.
I never tried them again.