Thank you both for your help..
.I would assume the 295/40 would have a bigger sidewall then the 315/35 so if thats the case I would rather stay with that in the rear,what would be the correct front to with the 295/40
It depends on the look that you want. Many here are doing the 245/40 Front & 295/40 Rear. This is what is on the Hurst cars. I love this old school "rake" look.
With the 295/40 you can do almost anything to the front because of your high side wall rear tire...you wouldn't want to match the height on the front... that would look awkward.
Also, the tire you pick is important. Brands have limited sizes when coupled to the 295.
I like the BFG KDW setup .... 245/40 & 295/40.... (The older tread design which they still make.)