[Mwieczorek]

Originally Posted by PONTIAC LARRY

Also don't forget a 3 something gear ratio needed for 4 speed since most common 66 auto cars have 2.56 (Catalina 2v) 3.08 3.23 minimum. Also I would consider a much newer 5 speed to see viability of swapping in and gain OD and maybe a deeper first gear. Aftermarket universal hyd clutch (hyd throwout bearing) set up can save you messing with unobtanium dinosaur stuff. If you find a deep gear 5 spd you may only need a 2.93 posi or something milder to get a good stop light drive away gearing in 1st.

Yeah, so now that I've done more research I'm leaning towards what you list above!

First order of business is to source a rear end with respectable gears and limited slip. I'm going to start a new thread to solicit information about suspension geometry...

Thanks!

[PONTIAC LARRY]

Originally Posted by Mwieczorek

Yeah, so now that I've done more research I'm leaning towards what you list above!

First order of business is to source a rear end with respectable gears and limited slip. I'm going to start a new thread to solicit information about suspension geometry...

Thanks!

your 66 gear interchange is between 65-70 full-size Pontiacs B body big 10 bolt cover that has a 12 bolt ring gear 8.875" 31 spline bolt in axles.

Great donor cars are Bonnevilles or Grand Prixs or Catalina 2+2 cars or any factory manual trans equipped car ... these will have a lower ratio than the average
automatic 389-2v Catalina or Star Chief.