Another place to look for power info on the 235 is inliners.com (6=8 is their motto). From what I've read, getting 200hp out of the 235 isn't too difficult (bore, balance, stroke, port, hei, carb), but I think you'd be getting a little exotic to go higher than that. If you want 300 or more, the sbc is probably the easiest (hence the most common) way to go.
Have fun and do what you want. It's your truck. A few here may judge (but just a little), but ALL will help.
Current fleet (subject to change w/o notice)
\'49 GMC 3/4-Ton , 60 Austin Healey Frog-eye Sprite (some assembly required), 2011 Dodge Avenger, 2015 Jeep Cherokee. No, they don't all run.
My other ride is a (B737)no, (B767)no, A320.... Update... was Embraer E190, now Boeing B787.
Knowledge is a wonderful thing, but ignorance means you don't know you can't do something.
