I was recently surprised by a NA viper alley member's dyno numbers. his mods/numbers:
RSI:510cid stroker, Greg Good heads, 11.6:1cr, 1.7 T&D's, crower stg 1 street cam, Bellangers headers, HF Cats, Bellanger cat-back, Split Sec. Still stock intake and TB
545rwhp 581rwtq (corrected from...