6inarow,
Do you have your kickdown cable hooked up?
Zeke,
I believe it's F-298 and no, you don't want to use it in a "mild" 235 with a stock automatic. It will want to idle around 800 rpms which would require an increase in stall speed to operate properly. Run the M4F or even a stock 261 cam instead. You should stay below 260 degrees gross duration when using a stock automatic. I believe Tom Langdon offers a split pattern camshaft that would work well also.
As for pistons, etc... I'm in the camp that tends to just bore it enough to make it "new" again. Considering the costs of 235 pistons that are bigger than .060", you need to ask yourself just how much am I going to gain by going much farther than that. I would like to see some performance numbers from somebody that can justify the extra cost of going from .060" to .125".
My last 235 was bored .060" over and it was pretty close to being too big for the head gasket. If you do go bigger, you may need to get a 261 head gasket.
Having the block decked to level with the top of your new pistons, combined with milling an "848" head, will help alot with how well it runs and responds and will give you the most compression you can get without popup pistons.
HEI is always a good idea as it will alow you to run a hotter spark for a more complete burn, wider plug gap, less/easier maintinence, longer plug life, etc...
I have run both balanced and unbalbanced engines, and I will never do a full rebuild on another engine without getting it balanced. It is soooo much smoother all the way through the rpms and it doesn't cost that much more to have done.
But that's just my opinion...
