Originally posted by pro70z28
9:75 to 1 is a bit high for a blower. If you plan to build a blower motor, you should consider how much boost? You may want to o-ring or use head gaskets made to handle the boost. Think about a steel crank, Forged 7 to 8:1 pistons. Aluminum heads? A cam ground specifically for a blower application is important. Carbs. or fuel injection, I would consider fuel injection personally- with a good supply of fuel so you DON'T ever run lean. It would be a good idea to install a programable ignition so you can taylor the timing to the boost. Your going to need a good cooling system. Free flowing exhaust. I know you said the blower is "down the road", but if that's your intention, now is the time to make the upgrade rather than buying parts twice. If your planning to go with an 8-71, I assume you are going to run some hefty boost numbers. Unless you plan to run 7 lbs. or less boost you'll should plan on beefing up the engine. Then after you've made all that new power you'll need to beef up the rest of the drive train and chassis to handle it. Or you can run low boost, but what's the fun in that? Right??
Pro70, Thank you for the advice ... Yes, I'll be limited to low boost with my compression. But the motor is already built. I think I'll just hook up the 8:71 at low boost until I get a stronger motor built. Oh you mentioned aluminum heads? It has AFR 195's on it. So that should help fight detonation. I like your thoughts on using injection and a programable ignition. I was planning on using carb's but the injection & pro ignition are a better idea...... I don't want to go 'into' the motor and put in a forged crank, forged rods, blower cam, dish pistons & such because by the time I would do all this I would have thrown out all but the block and heads! I'd be better off just starting a new and using this motor for something else. ....Thanks again, Bill.....

ps, I wish you the best of luck on your front end situation....