Roughly?
Yes, roughly.
The M-20 Muncie wide ratio 4th gear is exactly 1:1.
The Muncie M62 and M64 3-speeds have top gear ratios of 1.04:1 and 1:1 respectively. Not sure which of the two were in the 1963-1967 Corvette. And I’m not going to look it up tonight.
But, yes, the top ratios are ROUGHLY equivalent to the M-20.