Need advice......Ready to assemble a fresh NA 4.6 3v aluminum block stroker with forged internals. Going with the Melling 10341 HP oil pump that is 20% higher volume, and gives you a choice of running the installed 80lb pressure spring like the 5.4's, or replacing with the included 60lb spring as originally in the 4.6's. Any thoughts or experiences one way or another? I have lightly ported OEM heads and do have some very, very fine scratches in the cam tower seats and caps. the machine shop said that is common, and not to worry. Can the 80lb pressure cause issues with the VCT components, phasers, etc. Please advise