[Farmall] OT: clutch question...Farmall H (1951)

[gdombaugh at 1kms.com]

Gentlemen:
Most of you do not know me, but I am a quiet member of 
The list.   I have a question that most of you probably
know.

I am considering the replacement of my original standard 6
spring pressure plate on my 1951 Farmall H with a 10" - 9
spring version.  Will I need a new flywheel, or will the
bolt holes from the 9" Pressure plate match ?  I doubt it
will work, but I had to ask.
 I do not have it apart yet, but thought I should know
before I disassemble, and/or start buying parts.

Thanks in advance,

Garrell Dombaugh
Andover, KS