HI Stovebolters...

I am getting into another AD style truck project and I have found a company that makes what looks like a bolt on overdrive for the stock SM420 4 speed transmission. I have had 5 speeds for many years now and they do help in the top end of things...I know a T5 swap might be a good deal to but there seems to be a lot work to get it done....T5's in my neck are non-existence so a ebay find will be about the only option...

So has anybody run one of these...???

http://high-impact.net/rangeroverdrive/

Any insight would be an awesome thing...

MikeC

Last edited by mikec4193; 09/19/2017 5:29 PM.

1951 Chevy 3800 1-Ton
Howard Knapp
In the Stovebolt Gallery
1948 Chevy 1-Ton (sold Nov 2017)
1953 Chevy 1-Ton (sold 10/1/2016)