My S471 spools good, also I have a buddy with a billet 467 and it spooled real good as a single. Both are .90AR
When my truck (12v) was a stock head/cam motor I ran a single cast s465/83/.9. It would start to spool around 1600 by 1800 would have 10psi and come in very strong at 2k.
5spd, 175 pump, 4ks, tuned afc, and 5x.016's