A31PKG said:
quote]....My F3 that I had back in the day was a 3.55 s/g with a 22" rad. And it never ran hot.
mcmopar said:
You could order any ratio you wanted, with or without the Sure Grip, so if it was a dealer ordered car they could have ordered any combo they desired. If it was ordered by a customer the same thing applied. It is quite possible that the car was ordered with a 3.55 Sure Grip rear end without the max. cooling package, thus resulting in the 22" radiator being installed at the factory.
I dug up an old copy of my '69 Dealer Order Code List manual to share, and have attached a scan of page 40. It does indeed state that the 3:55 ratio was offered
by itself as an option in the Belvedere with the /6 & 318 engines only...neither of which, of course, were available in a Road Runner. Regarding 383 powered Road Runners, according to the document, the 3:23 peg-leg was standard with a sure-grip version offered as an option. Only two other ratios were offered: 3:55 & 3:91. Both of these required the ordering of an
axle package, codes A36 for 3:55 & A31 for 3:91. This in turn replaced the 22" radiator & core support with 26" versions. It also got you the 7-blade fan & shroud with viscous clutch, sure-grip diff, and 2 extra half leaves on the passenger side. Droptop, based on what I'm reading, I'm going to go out on a limb here and say that if your car was an original Road Runner, and originally equipped with 3:55's, then it had to have come from the factory with the A36 Performance Axle Pkg with the requisite 26" core support.
Comments, corrections, and public humiliation welcomed...........
:grouphug:[/quote]
The one thing I have learned over the years is never say "never" or "always" when referring to Mopars. Chrysler would do what ever it took to make a sale.
