I have been reading posts on swapping the 248 for the 263 and I am wondering if the anyone has experience putting a Dynaflow into a '37 Special? Also is the crank on the engine with a Dynaflow adaptable to the '37 flywheel? Any other problems other than motor mount switch, manifold switch etc. that might cause problems. I am assuming from what I have already read the dimensions of the 263 will be the same as the 248. Thanks for any help.