1947 to 1952 Engine Swap

**ailimac** · 05-16-2014, 11:31 AM

Thanks but doesn't help. Reference just gives years engine number were in. Need to know if corresponding engine number is 248 or 263.

**raycow** · 05-17-2014, 01:30 PM

Your engine came out of a 1950 Special and that makes it a 248.

Ray

**ailimac** · 05-17-2014, 02:50 PM

Thank you Ray.

**'51 Special** · 05-20-2014, 02:53 PM

This will be of little comfort to ailimac, but a 248 can be told from a 263 without a teardown (revealing the different size main journals on the 248) or resorting to engine numbers that Ray helped with. As Alleycat observed in his lengthy discussion on the 248-263-320, each cylinder on a 263 has a reinforcing rib running down the outside of the block. Those ribs are absent on the 248 (and the 320). Ailimac may have bought the 248 from a seller who indeed pulled that 248 from a '52, and just assumed he had a 263.
'51 Special

**ailimac** · 05-20-2014, 04:25 PM

Believe it or not this is all working out for the better. I'm actually glad its a 248, this way no modifications to radiator positionong are needed. And I've had the original 248 crank sitting outside throughout this whole ordeal. Its a little rusty but it seems to measure up to specs and will not need to be machined. So, I now have a nice newly cut 263 manual crankshaft and a 263 Dynaflow crankshaft. Except for some lost time and about $600 invested in the 263 manual crankshaft (shipping, machining, etc.) I'm ready to move on and get it installed. I figure they will make nice garden ornaments.

**JR9162** · 05-20-2014, 05:45 PM

Originally Posted by ailimac

Believe it or not this is all working out for the better. I'm actually glad its a 248, this way no modifications to radiator positionong are needed. And I've had the original 248 crank sitting outside throughout this whole ordeal. Its a little rusty but it seems to measure up to specs and will not need to be machined. So, I now have a nice newly cut 263 manual crankshaft and a 263 Dynaflow crankshaft. Except for some lost time and about $600 invested in the 263 manual crankshaft (shipping, machining, etc.) I'm ready to move on and get it installed. I figure they will make nice garden ornaments.

Hang on to that 263 manual crankshaft. They are getting hard to come by. Since all the machine work is done maybe someone will want to relieve you of it, either here in the US or across one of the ponds.