I don't think "modest cost" and the Tremec or Getrag solutions go together.

To my knowledge, none of the V8's outside of the early 450's were offered with a manual trans, which means that you are on your own wrt flywheel, pressure plate/disc, and bellhousing. It is a open question (but IMO, doubtful) as to whether the stuff from the earlier engine would work. There is also the issue of whether or not the crank flange could take a pilot bushing.

The pedal, clutch hydraulics, transmission, linkage, and driveshaft from a standard shift W126/M110 would work - but these are pretty hard cars to find in the US.

My .02 - good luck.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe