91gpse 
I will enjoy seeing the progress and what it can become. on the heads... removing the divider in the exhaust port is not a good idea... before making any changes to the heads please do more research on porting of heads... too many people feel they can just make ports bigger and they will flow better.... this is not the case when it comes to porting heads. you want to remove restriction and maximize the flow velocity. if the port is opened up too much, it will greatly reduce the velocity at which the air can flow. the best analogy i can think of is taking a paper towl roll, coffee stir, and McD's straw. try to blow thru the paper towel roll... cant get much force out of it can you? then try the coffee stir.... same thing but if you get a McD's straw you can get a good velocity at a descent flow. its the same thing with the heads... if the ports are too small there will be too much friction and restrict flow... if they are too large, the air wont move far at all. if you have just the right size you will flow the right amount at the right velocity to make power.
there is a head porting guide on here and other forums as well read up and you will be better prepaired. the divider in the exhaust allows each of the exhaust ports to flow faster then if they were combined. the only thing i would do is just at the exit, i might consider filling them down to a knife edge to allow the exhaust streams to mix with less turbulence.
