I put corvette 10 in. rally wheels with 235/75r/15 tires on my 46/1/2 ton and the just clear the wheel wells with about an inch to spare and I have 7in. rallys on the front with 225/75r/15 inch tires that clear the tie rods, I also have a 3 in. drop axle in the front and 2in. lowered in the rear,I run an S-10 rear in my truck,(see picture) as far as your motor, you can tell the difference between a 230 and a 250 by the block, its a bigger block, and has a different bellhousing,
