REPLACE FLATHEAD WITH SMALL BLOCK

[flathead]

I WANT TO REPLACE MY FLATHEAD WITH A SMALL BLOCK. I NEED TO KEEP MY 3-SPEED AND STOCK REAREND. I HAVE A 35 3 WINDOW FORD AND I'M TRYING TO KEEP MY COST DOWN.
WHERE DO I START? I SEE SPEEDWAY SELLS A ADOPTER FOR THE ENGINE/TRANSMISSION, BUT WHAT WILL WORK FROM THE ENGINE,STARTER,FLYWHEEL,CLUTCH??
ANY HELP WOULD BE GREAT!!

THANKS IN ADVANCE!!TEXT