9022 is a 800cfm ., the drive is a 1:5: 1 hence 1:1 trans should be a b/w 72c ,tranny weighs 110 , drive is 150 engine is just a LS6 with a crane cam , gold rockers etc.if it has a holley someone changed the intake , if not mistaken the 420 came with a alum dual plane intake and quadrajet carb.
same question you have-
Merc 420 spec's ??? What is it??
some came with the 800 a also
What carb came on 420 HP Engine?
use the "seach" option on the right top of screen . find anything you want....