All Small Six 250 Engine Build

[pmuller9]

I have contacted schaferstephen about a set of autotec pistons on 300 inch rods and have agreed to purchase them when the banker cuts loose funding next month (please don't anyone buy them out from underneath me.) These are custom and have the .912 pins

As you already know the 300 six .912” pin connecting rod is the 1965 to 1968 forging number C5TE.
Have you located a set?

 

[twentyover]

As you already know the 300 six .912” pin connecting rod is the 1965 to 1968 forging number C5TE.
Have you located a set?

The pistons are already hung on rods. They were in an engine and have run time on them

 

[zunepuh]

Am considering undertaking a 250 engine build using the 2,5 rods and 3332 pistons. The target car is an old English sportscar that came with a 2.9l engine that was overweight and oversize. And underpowered. The plan would be to make the swap keeping the body pretty much uncut so it could go backward if I ever lose my mind. A requirement is that the car have a manual transmission.

Trying to find a flywheel for a 250. Unlike the 200's, it seems these are unicorns. I understand they are the same diameter as 302 wheels- is the crank bolt pattern different, a different balance factor, or what? What makes them unique?

In a fever dream, if I follow thru with this plan and am unable to find a flywheel, I thought maybe, while browsing ideas like bmw auto accessories, start with an automatic flex plate, have an aluminum disc machined to the correct diameter, and cut so a steel clutch surface is installed. I've gotta cut down on the pizza before I go to bed

Hello. The 250 flywheel uses the same bolt pattern and 157-tooth diameter as small-block Ford V8s, but it is neutral (internally) balanced, unlike most 302 flywheels which are externally balanced (28oz/50oz). That balance difference is what makes dedicated 250 flywheels rare and not directly interchangeable.