[RA1John]

'64 GTO with factory Air Conditioning.

Replaced original dash harness/fuse box (4310-F) with repro one from M&H.

Noticed for the Radio fuse, there are (3) fuse clamps.
Assuming only the first (2) are used (short 9 amp fuse?).
Is the 3rd fuse clamp unused since AC has it's own separate harness with an inline fuse? On a non-AC car, there are (4) fuse clamps for (2) fuses. Radio & Heater.

Per M&H, they used the last/latest design rev. from Pontiac in '64 which is why their version has a 9 amp fuse vs the 4310-F which has a 2.5 amp fuse.

Anyone have pix of a factory AC fuse box; which fuse goes in the Radio slot?

Thanks!

[Red64GTO]

Here is a picture of mine and everything works fine

[John V.]

John, there are some older threads that discussed the '64 (and also the different '65) fuse blocks.

Although the '64 Shop Manual contained a picture of the 4310-D fuse block, it seems that the vast majority of 64s (and maybe all) were built with the 4310-F fuse block. A/C or non-A/C didn't matter.

The 4310 represents the last 4 digits of the full part no.

Despite the picture in the '64 Shop Manual, nobody seems to have ever found an actual 4310-D in a '64.

The p/n changed for '65 along with some of the graphics..

I didn't compare closely, but I believe your repro fuse block is not correct for '64 but rather looks to be the '65 style.

Review this thread for more.

https://forums.maxperformanceinc.com...d.php?t=753026

Looks to me that your original 4310-F is missing a a fuse clip (pic looks like the plastic broke out).

It occurs to me that the factory may have purposely broken that clip out for an A/C build, maybe to disable a circuit not needed for A/C builds?

The repro fuse block may be interchangeable between '64 and '65, the graphics would be incorrect but if it works, no harm.