I actually listened to your feedback and have changed out all the hardware so that none of the existing bolts are used. I just needed to personally verify whether some of the 75mm long stock bolts could be swapped safely with 80mm ones among others. All shouldered bolts and nylon lock nuts as well so no need for washers.
The heat soak issues haven't been seen lately since I switched to the MSD starter. I was really unhappy with the quality of the Tilton unit and switched it out. The original factory in Japan that produced Tilton's starters was wiped out in the tsunami and after that, there were dimensional issues as well as the hot start issues. I personally never had any issues with heat soak. Since the ground is through the nose, the mating surfaces have to be super clean and also the same goes for the strap between the block and body.