I am in the process of re-building the front end of my 70SS. I have all new PST polygraphite bushings, QA-1 coil overs, SSBC brakes, and freshly powder coated original A-Arms.....

I'm looking for bolt and nut sizes and lengths as i want to replace them as well....

Any ideas on how and where to get this info?

Go to the dealer. Some GM dealer around you should have them, lower control is same for all A-bodies through 72. As others have said don't risk your suspension and your life on hardware store bolts.

I agree. The factory nuts are also lock nuts.
They sell kits for these. Good money spend if the hardware is bad. I only replaced a few bolt because they were badly rusted.

Check this out from NPD.
64-72 Upper arms, includes bolts, lock nuts & shims.
C-6168-1AK 14.00

64-72 Lower arms, includes bolts & lock nuts.
C-6168-3AK 20.00

Are these what you are looking for, GU team sponser> http://www.ss396.com/mm5/merchant.mvc?Screen=PROD&Store_Code=chevellecamino&Product_Code=BPX-0918&Category_Code=OEMBOLTS

They have these as well> http://www.ss396.com/mm5/merchant.mvc?Screen=PROD&Store_Code=chevellecamino&Product_Code=BPX-8542&Category_Code=OEMBOLTS

Alright Guys!
Thanks alot for the replies! Great info. I'll check the dealers and NPD.
Mike

Mike, GU has the lowers as well> http://www.ss396.com/mm5/merchant.mvc?Screen=PROD&Store_Code=chevellecamino&Product_Code=BPB-1430&Category_Code=OEMBOLTS

I bought grade 8 with lock washers from the LHS. 10 years no problems.