The build I am doing now comes as close as you can get. A 235 engine with a .080 overbore (making it a 246) with full flow oil filtering, PCV and an 848 high compression head. But not with a pre-1954 235 engine. You need full pressure oiling to do some of these modifications.

The 261 document is here:
http://devestechnet.com/Home/TheVenerable261

The 235 rebuild is here:
http://devestechnet.com/Home/Project1959235


Deve

1950 Chevy 3100 Deluxe Cab
1950 Chevy 3100 Standard Cab
In the Stovebolt Gallery
The Think Tank
More info and tips at Deve's Technet