Help from the Wheel & Tire Guru's

[Surfman423]

I have a 1968 Camaro RS/SS with factory 12 Bolt and Multi-Leafs. The front suspension is still stock, just rebuilt. I am beginning work on it now with plans to change the suspension over to a Hotchkis TVS with 2" Drop. My biggest question at the moment is I want to order a new set of wheels and tires for it but no one in my area is very knowledgeable about what will fit. I want to put a set of Boss 338's in an 18" in front with a 20" in the rear. Going for a resto-mod/pro tour kinda theme overall. Could someone tell me from experience if a 20x10 will fit the rear without spring relocation or mini tubs or will I have go with a 20x8.5? Also what width would you recommend for the front and what tires sizes should I pursue? I am hoping to stuff as fat a tire underneath as possible without regretting it while driving down the road.

Also is there a better more cost effective solution to the suspension than the Hotchkis kit?

Thank everyone in advance for sharing your knowledge!!!!!