A friend of mine has a rebuilt 400 small-block in a 73 firbird. The oil pressure gauge reads 25 @ idle and 60 while cruising, but there is no oil getting to the rockers at idle, only when he revs it. What could cause this?

 

hate to say it but the cam bearings in right?(not so uncommon screw up)and ar ethe lifters correct?

 

I had a problem similar to this with one of my cars with a small block chevy. The engine was freshly rebuilt but no one installed the oil galley plugs in the front of the engine. There are 3 holes (about 1/2 inch in diameter) behind the cam gear that should have plugs in them. Without those plugs- you will get basically NO oil to the rockers. I put the plugs in and have plenty of oil to the top end now. Good luck.