[Jerry H.]

Originally Posted by BigAquaBonney

The Grand Prix:

Collector Car Market Review Value Report
1964 PONTIAC CATALINA 2+2 421-320hp (8cyl-4V) AT
#5 #4 #3 #2 #1
2dr Conv 1800 3850 7050 10175 13500
2dr Hdtp 925 2300 4375 6050 7925

Add:
421-350hp (V8-3x2V) 15%
421-370hp (V8-3x2V) 20%
4spd manual trans 7%
Air conditioning 10%
Power windows 3%
8-lug wheels 5%
Deduct:
3spd manual transmission -10%
Manual steering -3%

Collector Car Market Review Value Report
1964 PONTIAC GRAND PRIX 389-303hp (8cyl-4V) AT
#5 #4 #3 #2 #1
2dr Hdtp 1375 4025 8275 13575 20075

Add:
389-330hp (V8-3x2V) 20%
421-320hp (8cyl-4V) 15%
421-350hp (V8-3x2V) 30%
421-370hp (V8-3x2V) 40%
4spd manual trans 7%
Air conditioning 10%
Power windows 3%
8-lug wheels 5%
Deduct:
3spd manual transmission -10%
Manual steering -3%

I would agree that the GP would be worth maybe a little more than the 2+2, both with the base 389, both with 4 speed and both with the same quality of restoration. That being said, look at the above table. Those 'book' values are useless. Not just the ones above listed, but most all 'book'values. For example, on the one above they don't even show the 2+2 with the base 389 engine. They only show it with a 421. In 64 the 2+2's came with a 389 standard, unlike 65 & 66 where it was a 421. Looks like whomever put these values together didn't know that fact. You can see how that will skew the values tremendously.

Personally I don't think in the real world the values in those two cars would be that much different. JMHO.