[GTS Dean]

Not exactly sure which hole you are referring to, but I'll take a stab. If you are looking at the central cast void with the drilled orifice - and the other tiny hole to the lower right - then I would speculate the tiny hole is a casting flaw and I would recommend a heliarc repair to plug it completely. It looks like a problem to me.

 

[GTS Dean]

You can get the timing cover off in the car. It helps a lot if the shock tower strut is removed and the steering rack is unbolted from the frame (KEEP TRACK OF THE SHIMS ON EACH SIDE) and the steering shaft. You can let it lay forward out of the way.

 

[GTS Dean]

Here are some photos of the timing cover and oil filter adapter.

This one indicates the difference in flow paths between the ACR unit (left) without bypass and the standard filter adapter.

This photo is of the remote filter adapter that is used with the Dailey Engineering external oil pump setup.

 

[GTS Dean]

Been there. Done that. I have t-shirts and photos! The one view we still need to complete this analysis is the side view of the front cover where the adapter bolts on to see how it is ported.

 

[GTS Dean]

I KNEW I had seen some detailed porting photos somewhere and here's the link!

Oil pressure drop through adapter, oil cooler, lines

In cold starts (25F and lower) the oil pressure runs up to 60 psi at idle but behaves somewhat like the oil is not returning to the pan quick enough. At higher than idle, the oil pressure may go up, down or stay the same. I verified this with a mechanical gauge (which indicated the dash gauge...

driveviper.com

 

[GTS Dean]

How do you plan to use the car - mostly street blasts? What kills crankshafts is sustained high-G, high rpm turns.