My T-10 had a very low 1st gear and I had 3.55 POSI rear end. I could still see the light as I put it into 2nd! Lots of fun! I had a 850 Thermoquad with no restriction (spring) on the secondaries and she would suck it all up right off the line.
5th gear would be great to have though.
The guys on the google groups are big on after market iron so you should post there as well.
Engine Test Stand Playlist: https://www.youtube.com/playlist?list=PLwoxyUwptUcdqEb-o2ArqyiUaHW0G_C88 restoring my 1968 Firebird 400 HO convertible (Firedawg) 1965 Pontiac Catalina Safari Wagon 389 TriPower (Catwagon) 1999 JD AWS LX Lawn tractor 17hp (my daily driver) 2006 Sequoia 2017 Murano (wife's car) 202? Electric car 203? 68 Firebird /w electric engine 2007 Bayliner 175 runabout /w 3.0L Mercuiser__________________________________________________________
