I noticed that a board member here had some pirelli 360/35/17's and that they are hard to come by. Arent the rear tires on a viper close to this? Do they run a michelin tire? I'm sure that someone knows where to find a tire like this, or something to the extent of this size. Im really wondering where to get these and what they'd run, becuase im ordering wheels for my chevelle and am going with centerline telstar's at this point with bfg drag radials 325/50/15 unless i can find something more then 335's in 17's. For some reason the 325's look wider then 335 for 17's, i have a 94 camaro z28 with 18" z06 wheels with 295/35/18's and they dont look extremely wide.

'03 Vipers come equipped with 345/30/19's. My former Callaway ZR-1 has 345/35/18's on it but my 360's are much wider and a little taller,too.
Pirelli has a new 355/19 tire but I haven't seen or heard of one,yet.
Unless your 68 is tubbed and back-halved,there is no way these bigger tires will fit. My 69 Elky is a former prostreeter and does have the room.

clint, thanks for the fast response. Id love to tub and backhalf my car but id want a reason to do it. I dont want to get that all done and then slap some 295's in the rear it just wouldnt be using all of the available space. Where did you find your tires and would you be interested in selling them?

If you want some killer rolling stock for the rear,try a pair of 18x10 wheels w/5.5" backspacing and 295/35 or 295/40/18 tires,,maybe even some 315/30/18's. Just pick the tire with the width/height combo you prefer. Backhalving a car is very expensive. My car had already been done and I bought it for about what it would cost to do just the rear.($8K) Of course,I now have around $20K invested with lots left to do but hey,these projects take time.
I'm not interested in selling my 360 Pirellis as they are probably one of the very few pairs in the USA. However,if you do plan on backhalving your 68, I have some new BFG 345/55/17's for sale.
Those are very rare tires,too,but will definitely not fit your car unless it's been tubbed w/narrowed frame rails.

I have been looking and looking for a radical wheel/tire combo for my chevelle and the michelin pilot sport 345/30/19 which is what is on the dodge viper and I was wondering how much work i'd have to have done to the rear of the car to get them to tuck. I know tubbing it would be in order, and probably some sort of work to the frame. If I went with something like that, would traction be a thing of the past? Would I necessarily need to backhalf the car? Thanks

What I call "backhalving" consists of adding narrower frame rails,narrowed rear end,and wider wheel tubs. This will need to be done to fit the tire & wheel we are talking about.
Instead of running the 345/30/19's,I would look hard at Michelin Pilot Sport 345/35/18's,instead. At 14" wide and 27 1/2" tall,these are excellent tires and stick well,dry or wet. They are also not as rim-sensitive as the 335's,either. That allows you to run them on 18x11-18x13's.

That really sounds like the way to go 18x11's or even x12. Im just curious about the particulars, like how big of wheel tubs to look into, how much to narrow the frame and stock 10 bolt exactly (or even go with a 9inch). That tire combo would look absolutely wicked on a chevelle, I have yet to see a wide low pro set up on a chevelle. I know most everyone who runs an aftermarket rim on an old muscle car usually sticks with tq2's so i'll probably look into budnik's or bc's. They are billet wheels and make whatever offset. Speaking of offset, going with something that radical, what kinda offset would a person run?