Need recomendation for a shiftkit

Hey all Can anyone recomend a good shiftkit for a 67 727, I want a firm 1-2 but it must retain the 1st gear band{engine braking} function I have used the b&m kits with the "strip" setup and love the 1-2 shift but hate low gear coast has anyone used the "RV"-Towing" setup does it have low gear engine braking and is the shift firm?
Thanks
Scott
ALSO does the Rv-Towing setup Retain the Part throttle kickdown? as i am adding a 70-up PTK to the trans~:cheers:
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