News to me. I'd never seen one. Hopefully it lasts until I can find a new 261 block.
Is there any reason you can't make a 235 into a 261? Aren't the blocks mostly the same except for bore size?


1950 Chevy 3800 1-Ton Long Bed
In the Stovebolt Gallery
More pix on Flickr

Sold all the bikes, leaving California behind.