My take on the oiling system crossover tube for the small block

.
Procharged

If your going to use the straight on oil filter adapter. Drill those four holes out to the next size bigger. Then put a hole in between each one of those holes so that you have a total of 8 holes. That of course will flow twice as much oil or better.

P3690715 shaft and gear will take care of twisting the end off of intermediate shaft. This for the iron flat tappet cams not any roller types.

View attachment 1715253698

Mopar Performance Oil Pump Driveshaft and Distributor Gear Sets P3690715

On the previous block oil plate I drilled the 8 holes required and will drill this one too for future use.
I’ll look at fitment with the headers as I also have a 90 degree adapter I can use.