I built this kit stock except for motor, I put Revell's 383 from Mr Norm's kit in my GTX. & torq thrust wheels on my kit because that's how my full sized 67 was set up.
Both kits are excellent, If you are going to do it stock you may try to locate correct Stock steel wheels and dog dish hubcaps which most 67s came with.. I am clueless where to find these in 1/25 scale, I think the 1/24 scale 70 GTX from revell has these wheels. But look wrong on a 1/25 scale kit.
Be Well/DBF
Walt