Deck adjustment stuff... yes.
Deck itself... no.
Deck is required on USLMRA build. Most typically chop the deck removing the middle of it, and use the ends to mount outside the running boards to build to proper specs on width.
If you plan on using transaxle as final drive, the spindles on the blades can be, and sometimes are, used as a jackshaft to attain the proper height for the drive belt. In moving the transaxle up in the frame, to lower the frame to the ground, the belt from the engine to the transaxle no longer lines up, and you have to have an offset to move the belt up to height of the input shaft on the transaxle. Thus drive belt from motor to bottom of jackshaft, drive belt from top of jackshaft to input on transaxle.
Unless I'm mistaken however, that machine is going to have a Foote transaxle, which is less than desirable for racing application, they simply don't stand up in competition use. Thus you'll want to look into a different transaxle or go to a live axle set up as pictured in the G-Team Slideshow. You'll find a good bit of info on transaxles and transmissions here
http://www.heymow.com/viewtopic.php?t=697 , including pictures and a few identifying characteristics. Likewise there are links there to sites that you'll find helpful in locating parts for each.
There are some additional resource links on the
G-Sources page at G-Team Racing also.
