Wanted: 261 Chevrolet engine

[motto (RIP)]

Thanks Phil, the information you've provided has relevance to me also.
Last year I purchased a 1945 G506 Chevrolet 1-1/2 ton 4x4 from a fellow in New Mexico. When I drove it home from the import agent's premises I was very impressed with the performance and on further enquiry was informed that the engine in the truck was in fact a 261. It seemed even more peppy than I would expect from a 270 which I am very familiar with.
The unfortunate part is the engine rattles badly on start up until it gets oil pressure and it leaks oil like the Exxon Valdez so I think it best if I give it an overhaul.
These engines are a rarity in Australia so nobody knows much about them. This one has an oil filter attached to the manifold and we were wondering if it was full flow with its large diameter hoses. That question has been answered.
I feel a little more confident now knowing that information is readily available (and I assume parts also) so thanks again.

David

[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

[chris vickery]

Who said anything about a CMP???

[Bob Carriere]

.... your skiddoo????

[chris vickery]

Nope... but it is a HMV

[Hanno Spoelstra]

Originally Posted by chris vickery

Nope... but it is a HMV

1943 Chevy M6 G506 ...

H.

[motto (RIP)]

Maybe a little bit of inside knowledge there Hanno?

David