Blain-
Go to:
http//www.amxfiles.com
And go to the "Resources" section then go to the "Technical Info"
section and scroll down to a link called "AMC Small Block V-8's" and
there is a brief description of the 290/340/390 engine of your vintage.
If you don't find what your looking for in the site I'm sure there's
some real AMC gurus there that could answer your questions.
Frank(MI)
'47 CJ-2A
'63 6-230 4WD
'63 J-200 Gladiator
'64 Wagoneer (Organ Donor)
'76 CJ-5 Renegade 304 V-8
"When Your work speaks for itself, don't interrupt."
- Henry J. Kaiser
