3:27 or 3:54 ??

[Neil Mylar LakewoodCA]

I am buying a 1928 Tudor Sedan, soon.

I plan on putting a high compression police head on it (B on the head).

I have the option of adding either a 3:27 R&P or a 3:54 R&P.

In an earlier thread I asked if the police head would be enough to propell the 3:27 R&P in a light weight pickup truck. The concenses seemed to be yes.

As you know a Tudor is a heavier body. Would it be better to use a 3:54 in the Tudor or would the police head be enough to propell the 3:27?

Also, most parts houses sell a speedometer gear for the 3:54. No one seems to have the correct speedometer gear for the 3:27. As a default, some recommend the same speedometer gear as for the 3:54, which probably means that the speedometer would be off a little. Can anyone comfirm this?

Thank you,
Neil