Ok a few comments:
1) unless you plan on running sequential fuel injection later MS3 is overkill. MS2 with extra code will do fine for what you want to do. If you decide to run sequential now check Tom Lowe's thread on his turbo 292 - the 292 intake ports need to have dividers installed to do sequential. The TBI could be used as a throttle body for seq. injection if you remove and block the resulting hole where the fuel comes in. This would give you the needed TPS signal. You will need to run a BBC TBI to get enough fuel and boost reference the regulator if you run boost. Use a TPI type pump.
2) if you keep the boost low (8 psi or so) AND tune carefully then you can run the cast pistons BUT you must keep the engine out of detonation. 9:1 is fine even with boost.
3) which ever way you go do make the change to fix the quench problem - 0 deck the block and run the mls gasket(check piston to valve clearance first..).
4)MS can do boost retard - and activate a water/methanol injection kit under boost.
Too bad you didn't stop here earlier. There are other options that are less costly than rebuilding 60's vintage engines, that make 275/290 HP in stock form for $2000 to $2300 complete with 4sp OD transmission. But you have already spent your money.
1) I chose the MS3 for the possiblity of sequential injection in the future. Not on the 292 but potentially for another project someday where i would swap the system over. Or in case I get a 12 port head
I also just wanted the latest version and it's not much more money than MS2.
2) I was actually thinking of swapping out the pistons for forged no matter which build up I do.
3) Would it be acceptable if I just have the forged piston manufacturer build them with a higher compression height to bring the quench to .050 or so? I really do not want to disassemble the engine again and do more machine work. Plus I read somewhere that you should NOT machine anymore off the deck of these blocks. I think it was the leo santucci book. I need to read up on checking the piston to valve clearance. I don't know how to do that yet. This is my first engine build so I don't have all the tools and experience.
4) I wasn't sure if MS did that yet. That's really good though! I haven't given any thought to an injection kit yet.
Are you talking about the v6's?
