Original Spit tyre size

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

Another slow night. Does someone know if the original tire size on Spit Mark
IVs were 155/80 or perhaps 155/70? I have the bolt-on wire wheels. They
currently have 165/80s, a bit tall, but interesting.

I have a busted tach drive on my distributor and I'm trying to figure RPM
using MPH on my fresh engine among some other projects. A hassle to be sure.

If anybody is out there,

Tom