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

Jadaharabi said

When you drill for the crossover you must be careful to place it at the proper angle. Otherwise you will not be able to screw the 45 degree fitting in.

Start with a small bit and work up in size.

You need a 7/16 drill bit and a 1/4 NPT tap
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Lot of 4 * 1/4" NPT Male x 3/8" Tube O.D. Steel Compression Fitting 45 Elbow | eBay

9/32" Aircraft Extension Drill Bit 12" Long Moly 7 Lifetime Warranty Dill Hog | eBay

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Ordered those, picked up legit 1/2” and 3/8” mpt pipe taps from napa, 3/8” o.d. steel tube also from Napa, 9/16” drill bit and some pipe fittings from Home depot, then ordered a 45/64” bit off ebay.

Should be good to go when it all comes in and be set for retirement on tooling. LOL

I’ve now got from 1/8 to 3/4 npt taps, plus bits, plus an assortment of looooong drills.