Pontiac 261 Inline 6

[roddguy1]

I have a couple questions for all the inliner guys here. I'm in the planing stage for my daughters rat. It's to be ready for her 17th birthday. I've picked up a Pontiac 261 inline, T-5 trans, and a 9" rear for the drive line. My first question is what bell housing works on this engine? Is it the standard Chev type bolt pattern? Second, I can perchase a four barrel intake and carb that I know came from a 250 six. Is this intake interchangable with the 261.
Does anyone have any good sources of tech for these engines? I've not had to much experience with them.

 

[PA41]

The US 261 was the truck model of the 235 from the early 50s to around 60. Its not the same as the 250/292 sixes (they are a bunch better).

I've owned quite a few of both US series, but have only heard of the Canadian 261 (I'm in Arkansas), and I think it belongs to the 250/292 family, but not sure. I had a 250 that had been boared out 125 thou (1/8") and used stock SBC 327 forged popups in it--3 7/8" up to 4''?? That might be 261? Its been a long time. The dirt guys did alot of piston/rod swapping in the 6 cyl classes.

That motor never really ran like it should have--maybe the wrong cam.. It was originally an alky dirt track motor with a big time heavily worked head that I put a stock head on to get the CR down to streetable, and put in a milder cam.. Dirt track guys will try anything.

Not much help--HUH?? But anyway--I think the US 250 intake and standard SBC trannies will fit. Maybeso ?

PA41

 

[Sniper]

I searched through my stuff and found a vague mention in the Chevrolet Inline Six Cylinder Power Manual. I scanned the pages for you. Sniper

 

[PA41]

I searched through my stuff and found a vague mention in the Chevrolet Inline Six Cylinder Power Manual. I scanned the pages for you. Sniper

So according to that info, the Canadian 261 is the early series with the 235.

Good to know.

PA41