Hello im restoring my 1966 442 with 400 engine. Im having a ground up restoration and I wil like to build a nice street car.

Im going to overhaul the engine, bored at .030 and I will like to add a edelbrock manifold, carburetor and headers.

I have a Mounci transmission but I dont know wich one M20, M21 or M22? and I think I have a 3.90 Gear Ratio, But I think this combination is not good for a street car, I think the car is going to be in a hig RPM range with the 3.90 gear ratio.

So what is a good gear ratio for a street car?
Is better to change the gear ratio or buy a new transmission, if yes wich one is recommended to keep the hurst shifter?

thanks

Alex

 

I run 3.42's in my 66 442 and does fine on low end and top end.

 

I'd keep that low rear end; try it, you might like it! Unless you are going to be taking it on long freeway trips, the neck jerk action of those low gears can't be beat!

 

I run a stock 330 2 barrel carb in one of my olds with a 3.90, talk about a blast to drive. Will lay rubber for an entire block and thats with the stock 2 speed automatic. A little hard on fuel but who cares when your having fun. I can still run 65 mph on the interstate with no worries.

 

You may find this link informative

http://www.yearone.com/updatedsingle...nfo/muncie.htm

 

My 66 442 has 3:08's but It is not the original rear end. I want to find a posi some day.

 

X2. It really depends on how you plan on driving it.
But why add the performance with the intake and exhaust, and take it away with the gears?
Stock will be either the wide ratio M20 or the close ratio M21. 3.90s were standard with the M21, but could be had with either trans, so you can't tell the trans from what rear it has.
Olds thought the 3.90s were a nice match to the M21, and I agree.

 

Man this thread is 3 years old. I remember this guy had all kinds of trouble with his engine. I wonder what the out come was.

Gene

 

Wow, I guess it is an Old post. I was googling for people with 66 442's and ran into this post. I didn't notice the date of the thread. I wonder if he still has the car.