There was an interesting thread on the Inliners' BB recently on the advisability of using V-8 or 292-six multi groove damper on a 235 or 261.

I have one of Buffalo's modified 292 dampers, with two grooves, on my 261. So far, so good.

BUFFALO
ENTERPRISES
25625 Dahl Road, Arlington, WA, 98223
(360) 652-7684

Hoyt