New to me Barracuda with Mopar Crate 390hp low oil pressure

The 360 crate 390hp came with Hydraulic Roller Camshaft - 288°/292° duration, 0.501"/0.513" lift. Prior owner said he had a larger cam put in. He mentioned .520 lift but wasn't able to tell me what brand or model. He built the engine about 10 years ago, before the car was even ready. I assume he stayed with roller cam.

I checked clearance on rocker to valve stem on passenger side. I could not get a .002 feeler gauge to slide in on any of the valves. I didn't rotate to find TDC. I just wanted a quick check. So that would be hydraulic lifters, I assume. Several pushrods felt like zero lash as I could spin them.

It does have adjustable Harland Sharp roller rockers. Unknown if he used 1.6 or 1.7 ratio. My gut guess is he thought bigger was better and used 1.7 ratio.

She sounds like a big cam. Wife and I love the sound.

The only cam I found with .520 lift is Crane 708511. Which isn't a big cam and doesn't match my idle vacuum reading.
Advertised Duration:276 int./282 exh. 0.520"/0.531" Valve Lift.