Just finishing up a 3 year long ground up project and i need to know for a fact what backspacing will work with 18/9's in the back & 18/8's in front. also wheel sizes.......?
Thanks

not sure about 18's but checkout username DEADCARNEY down at the bottom he has 17's in the same width's on a '72......
http://www.chevelles.com/database/WheelTire.htm