Wheel dimensions, rims and tires and whatnot
 

so, i pretty much need new rims and tires on my 83 "L" type. I was wondering what would be the most ideal dimensions for the rims, front back and tire profile to get maximum performance, or at least good performance

With the L-type your a little hard pressed..You might be able to get a set of wheels from a 240sx to fit with out adapters because of the offset you need..If you put a set of P-type wheels on your car they will stick out a little..I have the stock wheels on my P-type just chrome dipped and im running a set of 235/60/14 tires and have no rubbing problems..There are very few companys that make wheels that fit our car..If you want a set of factory replacement 15"L-type wheels like the ones on the P-type go here http://www.capitalwheels.com Do a search for toyota supra...
Then get yourself a set of 225/60/15 or a 225/50/15 for lower profile..and you wheel wells should be filled out and have tire that is about 8.5" wide