Pete:
A couple of things,I had a similar girdle on my race engine and had to "beat" the built-in crank scraper back against the pan wall to clear the stud girdle (Canton pan), I doubt there is a pan out there that would fit with the crank scraper in place....on that note: had a nationally known engine builder told me the only thing the girdle will do is hold all the parts and pieces together when the engine blows up, and that's exactly what it did when I blew my engine....he advised that it was not neccesary unless one is using forced induction and 8000+ rpms...since I don't use forced induction and have a 7000 rpm rev limiter in the race engine, I did not use a girdle on the new engine...I rather have the crank scraper than the girdle.....
Next;that is a lot of "junk" in the pan, not good,it came from somewhere......
on the
oil pump, the only way to tell if it is a high volume or not is the part/casting number..... I have both by Melling and they are identical from the outside, the difference is in the gears on the inside, that's all.......
I see you pan has the trap doors,same as mine,the only thing I could see if your motor starved for
oil is a high volume pump and you were maybe low on
oil in the first place??????? I've never expirenced low oil pressure or a drop in oil pressure in long sweeping turns with my set-up at all, with the pan you have,you should not either....My pan looks pretty much the same as yours inside and it holds 8 quarts....since it is the exact same depth as the stock pan, the stock dipstick works just fine, with my external oil filter and 12 AN lines and oil cooler, total capacity is 10.5 quarts....
I'm thinking something else caused your problem, ate up the bearings,debris clogged the oil pickup screen,causeing low oil pressure, then no oil pressure...
I don't think the oil pump nor the pan are the cause of the problem......just my opinion.....
David