Slowest 1970 Chevelle build!

[Berg]

I will be converting this car to a 4 speed Muncie. I picked up what I believe to be an M20 from 1966 or 1967. I got a GTO 4 speed console and original round handle shifter along with this, both would be incorrect for my Chevelle. I'm planning on putting on a Hurst Competition Plus shifter and hooking up the reverse lockout. I have a floor shift steering column I will be swapping in but I'll save everything original to the car and throw it on a shelf somewhere in the garage. Back to the transmission:
Case casting# 3885010
Tailhousing # 3857584
Side Cover # 3884685

I believe the gear ratios of this transmission to be the following:
2.52, 1.88, 1.46, 1.00 with a 3.11 reverse. It has 2 rings cut into the input shaft, 10 spline input/27 spline output with passenger side speedometer hook-up.
it has the 1" countershaft with stud style shift shafts. I'll get pics sometime this week to show you guys... I'm still waiting on a Bellhousing. I would like to throw in a 621 even though i'll be using the smaller clutch and flywheel but i'll probably end up with a 403 casting. I plan on running the bench seat with no console, it would be different plus I already have all the materials to rebuild my bench seat. I'll hang onto my buckets for a while just in case I get the urge but they need to be rebuilt.