YF3 Registry

Frequently Asked Questions

Q: How do I know if my Chevelle is a Heavy Chevy?
A: First, it has to be a 13437 or 1C37 Chevelle sport coupe. Second, it's easy to put decals on any 13437/1C37 Chevelle or add a domed hood so some sort of documentation such as a build sheet showing the YF3 option or dealer invoice showing the option.
YF3 Registry
This happens to be a 1971 YF3 optioned Chevelle with a 307 engine and TH350 transmission.

YF3 Registry
Here's a 1972 YF3 optioned Chevelle with the L48 350-4 and TH350 transmission.  Note in both instances there is an RPO code BW1 to delete rear ornamentation which is also unique to YF3 optioned Chevelles.

Q: Could I get gauges like the SS?
A: Certainly.  The SS optioned Malibus came standard with the round gauge pods for fuel and speedometer where the Chevelle came with the same sweep dash as non-SS optioned Malibus. The RPO U14 Instrument Panel gauges were available in both the Chevelle and Malibu series coupes so, yes you could get the same round gauge pod dash in the Chevelle as in the Malibu by checking off RPO U14.

Q: Will a matching numbers engine verify a Heavy Chevy?
A: No. Any V8 except the 454 was available in a non-YF3 optioned Chevelle sport coupe so a matching numbers engine would tell you nothing about it being a factory optioned Heavy Chevy.

1971 Heavy Chevy Option
YF3 Registry

1972 Heavy Chevy Option
YF3 Registry