From what I've read, all the classics except the 69 take 7" Par-56 (that's the package size). The 69 takes 5.75" Par-46.
The original Par-56 was number 6012. A popular replacement at the time was 6014 for more output. The halogen replacement is H6024.
I ran across a test a hot-rodder did in his garage. It doesn't seem to be too accurate- rounded off to the nearest .25A, and all were tested at 14v (as though charging):
6012 low 2A 28w
6012 high 3A 42w
6014 low 3A 42w
6014 high 3.5A 49w
H6024 low 1.75A 24.5w
H6024 high 4.0A 56w
All of this may not sound too exciting, but if you have a 69 the total amps is around 15 on high instead of 6-8 for the other cars, and that can eat a light switch. Do yourself a favor a go with relays.
Original Owner 69 Mach1
Last edited by Mach1 Driver; 09-02-2019 at 07:39 PM.