Ok, first things first. Welcome to CHR, Ivan, good having you with us! If you're going drag racing, all the engine in the world won't do you any good unless the rest of the car is capable of applying the power and getting it down the track safely. What kind of car do you have that you're building this engine for? Are there any mods done to the chassis and suspension at this point? From your post it sounds like you're going for a dual purpose street/strip car, so you should know up front that any dual purpose car is going to require compromises. Is the car going to be a daily driver, an occasional Saturday night, or somewhere in between?

You mentioned 13.5:1 pistons...Is this an estimate or is this the compression ratio you're wanting to build the engine to? IMO 13.5:1 CR with cast iron heads is quite impractical for a street car, going to take hi quality (and Hi Dollar) race gas to run it!!!!

If you would supply a bit more background on the entire project it would help people to make suggestions for you to consider!