Oil pump change?

[mod1973]

I finally had an engine builder build us a complete engine instead of doing it myself. Its a 355, unported vortec heads, solid cam, performer intake, 4412. On to my question, he used a big block oil pump in this build. Who do some of the old guys do that? Am I loosing power needlessly with it? I used to use the 10552 or 10555 on my builds, would I find power going back? Other options?

[500BOMBER]

Back in the early days, the big block pump used to be the only high volume pump. There were no 10555's or 10552's etc. Personally, I don't think the "power" difference, if any, would be much to be concerned about.

[merc123]

That's all mine uses with a modified spring.