question concerning a 340 buildup?

I have got the 340 running and working and I wanted to say thanks to everybody for the help and advice. The engine is now working with the Tunnel ram and two 600cfm Carter carbs and it is working pretty well, only needs minor adjustments on idle mixture. I have changed the gear at 7000rpm, but the engine seems it would be able to pull past that point easily. It revs up easily and it pulls pretty strong, I havent been able to test it properly for quarter mile times, since the car is having severe traction problems.:burnout: But I will try to get those solved before next summer.. (anybody know of a manufacturer that makes wide tires for 14 inch wheels? or perhaps slicks)