[Bob Carriere]

Rest assured Chris the 261 will fit... bolts right in with no modificaton to the CMP BUT as Phil pointed out the water pump from a 216 with a suitabe adapter plate is mandatory.... and easily found on EBay.

Fitting into a cab 11 CMP requires a bit more finess... you have to use a Cab 13 draft tube and you will need to run a small distributor from a 216 as the later 55 to 61 rubs on the engine cover.... no such issues with the cab 13.

I chose to use the original 261 flywheel with the HD 11 in. clutch plate....all rebuilt by Ottawa Brake and Clutch... of course I am running on 12 volts.

I found an after market hot rod twin oil filter mount that accepts the modern PH 8... this gives me an additional 1.6 liter of oil......oil pressure 40 pounds at idle .
Vacuum steady at 22 inches. The twin oil filters are mounted inside the frame on the pass. side and not visible. Had the original GM 1/2 in steel line refitted with modern rubber oil lines for the plumbing.

Runs very nice. Ran a Rochester B for a while and dids not like the gas leaks an switch to a YF carter manual choke.

Carbs were rebult by the Oak Brothers in Toronto they still use the old fashion flow bench to test and set up there rebuilt carbs.

Cheers