I'm looking to replace the 15" torq thrust wheels on my 65 with some 18" torq thrust M wheels.

Does anyone know the bolt pattern and back space I need to run?

I've used online calculators and even trusted some vendors with other cars I've worked on, and even their reliability is at about 50% so I'm hoping for some real world answers

 

Bolt pattern is 5 x 5".

OFFSET (not backspace) should be close to zero. Backspace depends on rim width. Offset is independent of rim width. Depending on the wheels you pick, you may not be able to find zero offset. My 67 D88 has TTO wheels. 15x7 fronts with -.25" offset on the front and 15x8.5 rears with -1" offset. These are not made in zero offset.

 

ok, thank you. that's a good start