oil pressure

I just built a 408 stroker and my oil pressure flutters very quickly once it warms up. It goes from 38-44 very quickly. When cold it stays at 65. I’ve never had a fluttering problem before and was woundering what it could be or if it’s a concern. When cruising 1500-2000rpms oil pressure stays at...

I am looking to install a three gauge cluster on my 65 mustang. It is the 3 speed 200 ci I6 coupe. Mainly to keep a close eye on oil pressure and temperature. Wanted to see if i should go mechanical or electrical and if anyone could link installation instructions that would be much appreciated...