a smaller cam with a tight lobe seperation will work just fine. something around 220 @.050 dur. and about .460" lift. 108 centerline...it will sound great, give a real nice tq. band and still pull decent vacuum....larger is not always better. especially without a conv. gear combination. check...
the beauty of it all is you can cut, fab and create unlike any other...put the motor as far back as possible...fab some mounts, headers ect...I love stuff like that...it should be pretty straight foward.
Bogs under acceleration
you have various functions of the carb...idle curcuit, main metering and pushing the accelerator activates the accelerator pump shot...sounds like the accelerator pump is bad...go through the carb, clean a few times and you should be ok....