jwscab wrote: ↑Mon Nov 27, 2017 6:56 pmPhin, don't forget you are thinking buggy nose, this is the buggy rear part of the chassis, a lot narrower.
I didn't miss what end of the chassis the cars were using.

When I was helping Jeff out with the A-Main Bullet we had to narrow up the space between the arm mounts compared to a buggy nose to get the correct front track. That car used RC10 short arms, stock front blocks, dog bones and Optima caster blocks and steering. The fwd RC10 conversion in the magazine article I linked uses RC10 short arms but unknown steering parts or inner blocks.
Now, the rear arm mount holes on a tub are narrower than what was used on the Bullet...originally I thought 7mm narrower but it might actually be 10mm total (or 5mm per side). That'd make the rear arm mount holes too narrow to use the same suspension parts as a Bullet but not narrow enough to use RC10 rear arms with Optima casters and knuckles.
RC10 rear arms are ~15mm wider than short arms, pin to pin....so that'd leave the car 10mm too wide per side. Rear arm mounts will also add a couple of mm per side compared to the front arm mounts.
Team car length front arms with Optima caster blocks, and steering blocks should be closer to buggy width.