Hi Walt,

As the boys are telling you, the 235/sm420 combo is at its performance limits with a Big Bolt in its stock configuration -- if you start modifying it, you make the truck pretty much undriveable.

Bottom line -- for safer, higher speeds, you need to switch out the driveline completely. It's a lot of work whether you just switch out engines and axles, or if you switch the body over to a modern chassis.driveline.

Grigg (moderator for this forum) is in the midst of doing that to a 2-ton and you can see his project here

Whichever way you go, there's a lot of expertise available to you here. Stay in touch with us and post some pictures somewhere (like photobucket) so we can see.

Thanks,
John

~ John

A kid raised on Hotwheels, Matchbox and Tonka cannot be reasonably expected to own only one vehicle as an adult.

1949 Chevrolet 3804
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