TR7 wheels on a Spit

["Tom Ambrose" <tambrose@tir.com>]

I need some advice about fitting TR7 steel wheels to my Mark IV Spit Body
and Frame.

After putting some Yoko A-008R 185/60s on the wheels, I find that there is
only about 3/8 " clearance between the rear radius arm and the tire (a
little less than the 205/60 Yokos on my other Mark IV!).

What sort of clearance do I need between the radius arm and the tire? The
original bolt-on wire wheels have a tad over an inch distance with 165/80
tires.

TIA
Tom