Oh, if you are going to do that to a 235 you might as well do it to a 261. Then you get stronger rods and a larger bore, and full flow oil filtration, but pistons may be harder to find. The rest of the work won't cost you any more. That is my plan. My 261 is stock and good right now, and I have a spare 235 in the garage to drop in while I send the 261 to the machine shop.
The 261 had 150 HP stock, and wakes up more with just better breathing. The corvette grind was used on the stock 261 cam and it is still pretty smooth, you could go with a much more agressive cam and still have a good idle. I like mine a lot.
