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Im after either a 1st gen camaro or firebird to semi pro tour..what are the biggest rear tyres on 17"rims you can get on a 69 w/out modification? also to lower the front do you have to use drop spindles and would stiffer springs be needed? p.s anyone has a car for sale(not pristine but half tidy)
Hi & welcome to the forum 
The largest 17" wheel & tyre combo to fit a '69 Camaro is:-17x8 front wheel with a back spacing of 4&7/8" or 5" maximum
245/40/17 tyre
17x9.5 rear wheel with a back spacing of 5.5"
275/40/17 tyre
This is only a close guide though, as there are things that can make a difference such as ride height/possible arch repairs etc making the body different to manufacturers spec.
You have to remember though that the 67-68 Camaros have different arches to the '69.
As to dropping the front, yes you can use dropped spindles, that'll only lower it a small amount, or alternatively, have the stiffer springs made to the height you want them to be. hth
cheers...Nige