<VV> Big Rims

[Padgett]

Hokey folks, I know of at least three different backspacing families used 
in GM 5x4 3/4 (aka 5x120.7).
1) The early drum brake cars (maximum backspacing)
2) Mid-70's disk brake cars (mid)
3) Late models (least)

Now to maintain geometry the backspacing should be around 3.75" on a 6" rim 
and 4" on a 6" rim. The 14x6 Snowflakes I have on the front of my 66 only 
have about 3 1/4" which increase the track (sticks out) a little but still 
inside the wheel wells on mine so looks good. Steering effort is up a bit 
as is the arc the tire makes when turning (why a 195x70x14 is all that will 
fit).

Do not know anything about the late models other than they are "different" 
- anyone know why ? Could see GM trying to fit FWD wheels on RWD cars as a 
cost savings but then the backspacing would increase, not decrease.

Just to add to the confusion, aftermarket wheels usually toss in a bit 
"more" just to maximise the number of applications. No dealer wants to hear 
"those wheels you just sold me hit my brake calipers.

Padgett