Did a little looking at brochures and part books about the short versus long wheelbase versions of the 71-72 big Pontiac...
The wheelbase difference was 2.5" (126" vs 123.5")
The overall length difference was 3.8" (226.2 vs 222.4"). Since the quarters are the exact same lengths as are the doors than it's all in the fenders? That would mean they have extra length in the front and back of the fender (2.5" behind the wheel and 1.3" ahead of the wheel). Make sense?
By comparison the older cars had all the extra length in the trunk...
69-70...Wheelbase (125" vs 122"), and three additional inches in the rear overhang for 6" total extra length (plus half an inch on the Bonnie only for the rear bumper pad).
In 65-68 the wheelbase was also 3" different (124" vs 121") but the rear overhang was 4" longer for a total of 7".
In 62-64 the differences were the same as 65-68 but the wheelbase was one inch less all around (123"-120"). In 61 the wheelbase was (123" vs 119") but the overall length difference was still 7".
In 59-60 the cars were a bit bigger than what followed, 2" difference in wheelbase (124" vs 122") but again that 7" total length difference.
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My Break Away Squad
1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops)
1969 LeMans (2dr & 4dr Hardtop and a Cvt)
1969 LeMans Safari 2 seat Wagon
1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop)
1969 Catalina (3 Cvt’s & a 2dr hardtop)
1969 Ventura 2 Seat Wagon
1969 Executive 4dr Sedan
1969 Bonnie Cvt
1969 Bonnie 3 Seat Wagon (2 of them)
1969 Bonnie Brougham (4dr Hardtop & Cvt)
1969 Grand Prix SJ (2 of them)
1969 2+2 2dr Hardtop (Canadian model)
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