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Take the code down to your local paint supplier and they should be able to help you out.

It's on the data plate on the cowl. Right above the master cylinder.

I have them on the front of my 78 and 255/60/15 on the back. no rubbage. :)

I don't have a pic but you will need to set under the dash and on top of the column towards the firewall there will be a switch with two heaver purple wires coming out of it. disconnect them and run jumpers to your quarter stick BTW the smaller wires (green and white IIRC) are for your reverse...

I've run 255/60/15-235/60/15 for years

I did it on the bu with the summit kit. nothing to it. Do you have an idiot light or gauge?

forget the boots whats up with the reciver hitch? :lol:

I wouldn't use it.

x2 we put a set on for a customer last week .....they weigh a TON.

FWIW I have a yellow top Optima and it cranks up even at -20. I think it's a 725CCA. but that's with the stock 305 and compression so low it would probably run on kerosene!

My guess is that it's in the turn signal switch, they get kinda nasty after 30 years! ;)

Don't mean to hijack but did you use 78 spindles or switch to 79and later? Your set up has me thinkin' about swapping mine :)

I think Canadian-t-bone has them on his bu. maybe he will chime in .

I had the same problem with my MSD the fix is to splice in a diode in the brown wire coming off the alternator, which is back feeding the MSD and and giving you the no shut down deal. As far as the starting I would look at the ignition switch on top of the column.

yup

That's not a defect, that's a feature. :lol:

I just looked it up on a factory wiring diagram and "supposed to" go to the batt terminal on the starter but like the other guys said, constant 12 volts is all it needs.

Is it hard to push after it sits for a while or when it's been driven? If the latter the fluid may be getting hot and expanding. just a thought.

yup

yellow top in my bu as well. love it