[Doug]

Sounds like the car may be a car in "#4 condition". This info from a website gives a pretty good idea of what it may be worth. (Keep in mind that the 428 motor is worth several hundred dollars by itself. If it happens to be a decent running motor, it would be worth even more.)


#4 Fair: runs and drives OK but needs work throughout the vehicle. Body shows signs of wear or previous restoration work. Any rust should be minimal and not in any structural areas. Cosmetics, body, and mechanics all need work to some degree.

1969 PONTIAC BONNEVILLE 400-340hp (8cyl-4V) AT
#5 #4 #3 #2 #1
2dr Convertible 1000 3625 7075 11125 15600
2dr Hardtop 625 1425 3775 6800 10750
4dr Hardtop 450 1425 3375 5600 9025
4dr Sedan 375 1225 2900 4825 7750
4dr Wagon 625 2000 5150 9125 13900

Add:
428-360hp (8cyl-4V) 5%
428-375hp (8cyl-4V) 5%
428-390hp (8cyl-4V) 10%
Power windows 3%
Brougham trim 5%
Deduct:
3spd manual transmission -10%
No air conditioning -10%
Manual steering -5%

[blubomber]

One more note on the motor

The YH code 428 360 hp engine is a small valve design. They produce decent power and lots of torque but are not really muscle car motors despite their displacement. They are 2 bolt mains. These cars usually came with a 3:08 rear end.

The YK code 428 is a true muscle motor with drilled in valve stems, large valves, higher compression; 10.75:1, long branch exhaust manifolds, larger exhaust pipes, competition cam, high capacity oil pump, stronger distributor advance springs. Listed at 390 hp they were probably more like 430 hp. This is a differnt engine than then YH motor espite their identical displacments.

These YK motors were not available to the A body or Firebird cars due to the GM restriction on 400 motors or smaller for all A F body cars except the Corvette. This was lifted for 1970 to combat the large engines used in Ford and Dodge/Plymouth cars. In 1970 you could get the 455 in mid-size GM cars. This situation has restricted the limited the disireability of the 428 for muscle cars. 455's are more desireable in general. You can get year correct 455's for $650-$850.

[blubomber]

One more note. In '69 the YH code 428 became the standard engine in the Bonneville replacing the 400 which was the base motor in '67 and '68. The YK code 428 was optional.

Other 400 cid were also optional but it is fairly uncommon although I have seen 1 or 2 400 cid 2bbl cars. These were special ordered most likely because the owner wanted to save some money on fuel since they used regular v. premium gas.

[smaman]

Thanks for all of the helpful information guys. Doug, what website did you get the #5 thru #1 values from? I go to nada.com but it's always nice to see other opinions.