[fiddyfofoad]

i'm in the process of changing over my 54 ford, 6cyl to a neg grnd 12v system using a delco 12si alt. right now i'm trying to position the alt so it lines up with the other pulleys. i found a brkt from a 52 cadillac that would put the alt in the right position, but the ears on the brkt are at the ends and i would need a 8" bolt. so far this is not a problem. the blip is that the hole in the alt is 10mm. would anyone out there think twice about drilling out the alt hsng? all of the openings would be taped to keep the shavings out. it's either that or fabricate a brkt that would require a shorter 10mm bolt.
thanks,
fiddy fo foad

[66GMC]

My only comment is that all subsequently-replaced alternators would ALSO have to be drilled.

12 SI alternators have been around for a while ... I think. Perhaps one from the 70's would be drilled for 3/8" or 7/16" bolt?

I'm thinking 77 Olds Delta 88, 403 engine, 80 Amp for an application example


HTH,
Don

[docvette]

Doc here,

Before you start making brackets and drilling stuff out...

If your going for the "Retro" look...and want to also use your stock mounts (straight up change out..)

Call or Email these guys..

Genenator

They make an alternator (or will convert yours) Right in the stock generator body...only you will know it's not a Generator..and you don't have to re~invent the wheel...

Doc

[russlaferrera]

Not seeing the bracket. Could you drill out the mounting hole in the bracket and re tap it to 10 mm Helicoil? Or use an insert?

Just a thought. russ

[Tbucit]

My thought would be to do what ever you needed to do to mount the alternator. If it needs to be drilled drill it. It sounds like the least expensive option.
Randall

[knighthawk]

drilling the alternator should be the last resort, cause what would you do if you needed to replace it on the road some day ??? like on sunday at 4pm in a Walmart or K-mart parking lot ???

[Brian_B]

I would fab a bracket. That sounds a lot easier than carrying a drill and tape with you wherever you go. They always go out when you least expect it.

[fiddyfofoad]

guys, thanks for all of the input. didn't even consider breaking down on the road. thats something to ponder.
fiddyfofoad

[docvette]

Doc here,

Without a photo (s) of the mount system it's really kind of hard to comment..

But If you go with the Delco, Would it be possible to get a bolt, slightly longer than needed, that will fit INSIDE the Delco, Then Cut the Head off the bolt and weld it to the mount...So the threaded end is FORWARD??

This way the "Stud" would remain when you pulled the Alternator, and on install, you'd just need to install a Washer, Lock-washer, and Nut..Sorta bass~Ackwards From the rest of the world..

Doc

[fiddyfofoad]

after thinking it through, i think it's best to leave the major component unaltered. i have a few different ideas running through my head. i'm not 100% sure the caddy brkt will put the pulley dead on, so i might make a brkt that is adjustable to say 3/8". i'm lucky that i work in a mack truck dealers parts dept. where you can find parts that can be modified to do almost anything, thats how i got the alt direct from delco for cost. thanks again for all of your input in helping me make the best decision.
fiddyfofoad

[docvette]

Doc here,

KEWL..

Don't leave us hanging..post back the results..

Doc