[mockingbird812]

&quot;Rear&quot; block reads &quot;KF&quot;. Should this read &quot;CKF&quot; for a 1970 rear code vs. a two letter code for '69 Chevelles and earlier? However, KF or CKF is correct for 3.55 ratio positraction which is called out in lower half of BS. BS otherwise looks good to me, but I defer to the EXPERTS! [img]<<GRAEMLIN_URL>>/scholar.gif[/img]