"Oldskool
He has a m21 he is wanting to use. It has a 2.20 first gear unlike the m20 2.56. Pulling out with 3.23 will be a dog. GM would not use gearing higher then 3.70 with a close ratio Muncie. Must options were only allow 3.73 through 4.11

I would not recommend anything anything higher the 3.73 ...."



"...top end (which is what I am looking for now...)

This is why I mentioned the above 3000 rpm at highway cruise speed. From what his statement says, he is, at least for the present, wanting to keep decent high speed cruise gears. Don't think 3.73's or even 3.55's fit that description. But, now, for me personally, I ran 3.90 gears with a close ratio trans for 60,000 + street miles and loved 'em. But I didn't do hardly any 70mph driving.

So, I reckin what is a compromise to some, is totally unacceptable to others. It's not a whole lot different from a cam thread. It all depends on your particular likes, dislikes, and opinions. I suppose that is what a lot of the forum conversations are all about--telling what we like, or what we did, or what we think others should do. Most everybody has an opinion. And, on car forums, most of us give ours, whether others agree or not. Just an observation. I sometimes find it amusing to read what one guy says won't work at all, then 2 guys will come on saying how they did that exact thing and it worked great for them, for years, with no problem.