I have always heard single line systems are good too 7K. Well I would hope so seeing I have personally ran internal 3/8 NPT pickups to 7K.. Not just a one hit wonder either my Old Dakota had a 7 quart pan stock High volume Melling pump and every single pass it would go 6800-7K.
So in theory the Single line should go 7500 or there bouts. and I have also turned the duel line HV stock Melling pump to 8K too.
Im getting ready to address the new race car's oiling system and mock up, make lines etc. And was debating the use of a single line over the duel line external oiling systems.
The single line kit can be pieced together fairly cheap using a static 440 source pickup and utilizing a single line pump cover.
Engine is a pretty serious effort bracket type engine. 499 Low deck fully ported B1 Originals, 14:1 compression billet crank and rods etc.. So it will want some RPM

[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]