no need or benefit using a 80lb pump on a street car that barely sees 6000 rpm.
you can add a hardened washer to shim the spring a bit for a few added psi along with a bigger check ball. did that on my 400/467 stroker, using 10/30 oil i get 70-80 psi at "cold" 75-80f start up, then a solid 25 hot idle. more is not better in this type of situation.
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