try .5 to 1 at first and maybe 2-3 max be prepared to block the intake in case it sticks the governor. it shouldn't need much to make it use the extra rack travel.

__________________
1985 300D om617: 8mm M pump 175cc 5200rpm, holset he221w @ 30psi, large A2W ic, compounds on the way.
KD9AFT
A&P