Tech wiki has good imfo on building your own winged metal sumps

Can't remember cost was back in 2010. They are used with an oil cooler. Pressure up to 85psi but it's the volume that you are after which both have kept my 1300ccmotor together and reving to 9000rpm for the last 7 years. That motor is now retired to make way for it's big brother.

PJZ has hi volume pumps for sale.
I use one of his.

Not sure what you are looking to do with the motor. I have been running the 1300ccmotor since 2010 x 8 race meetings a year with a stock sump Hivolume oil pump and oil cooler with no problems 20w50 oil and filter every meeting(just for peace of mind )
I did copy the alloy winged sump back in the 70s out of steel with hinged flaps.Greg.

It is far too long ago to remember that sort of trivia.possibly 1000 wagon had steal diff

Hey DD the hole in the top is machined in to allow oil to move between front and rear pinion bearings.
The alloy diffs were so light but not as strong as the metal ones when you start to put a lot HP through them like Rob souter and i did with his sports sedan(amean factory L1780cc mid mounted. Aahh good memories.Greg.

I could be wrong didnt some Datsun 1000s come with alloy diffs.i do remember having one in our box of tricks back in the 70s&80s? You have to remember i have been dealing with Datsuns since the late 60s and have probably forgoten a hell of a lot

I have a set of orange and white assemblys I got of ebay for $15 each they appear good quality but the wires are back to front.For my 120y coupe not shaw if the fit 1200s
cant seem to upload pics they look the same

Then you will need to build your kids cars like I did.

We never got the cherry in Australia which was a shame