The A66 Challengers were a late addition to the 1970 model year Dodge line-up.
*** I believe the E60-15 was also late to the 1970 party. (not as late as the A66 though) ***

Early A66 cars had E60-15 Goodyear Polyglas GT tires that were included in the "package" price, but "rallye wheels" were a required OPTION at additional cost. Wheel lip mouldings were "DELETED" as part of the A66 "package". At some point the included (A66 "package") tire was changed to F70-14.

IIRC - the need for "HEMI FENDER"s was due to F60-15 tires rubbing under heavy-braking on nose-heavy HEMI'Cudas & Challenger R/Ts.

IIRC(2) - AAR & T/A "TRANS AM" cars were to have G60-15s on all four corners & would've needed modified fenders to clear the front tires. The G60s got the axe before production & we've been scratching our heads since.



So ...... late in testing (July '69) /early in production (August '69) fender rub problems are showing up on the F60-15 tired HEMI e-bodies. The brass is pissed - Chrysler has to spend money & sub-contract Creative Industries to modify fenders. HEMI Challenger R/Ts are loosing their wheel lip mouldings in the process. About the same time, Dodge product planners discover Plymouth is offering their muscle e-body 'Cuda with the 340 engine. The new for '70 E60-15 Polyglas GT is on both the Dodge & Plymouth e-body OPTION list, but quantities are low & aren't available for early production. Dodge tries to one-up Plymouth & includes the E60-15 Polyglas GTs in the A66 - "340 package" Challenger, but they are aware of the wide 60 series tire "rub" issue & the A66 cars loose their wheel lip mouldings.



Are factory workers (or others) modifying A66 fenders in a manner similar to Creative, but just rolling the area in front of the lip brace? Was this just a LA "thing" since creative was 2500 miles away? Did the "brass" catch wind of this "procedure" & influence the change to F70-14 tires?