I'm building a set of Holly 4000-1434 carbs for my 312 T.B. engine. The engine has been bored 60 over with a Isky 300 cam, G heads and the correct 3 speed OD trany. I'm replacing a pair of 1437's which I couldn't idle below 1000 RPM. My first question is about the throttle plates. I read that Ted said a good way to check the plate alignment was to put a light behind and check the bores. The shaft bushings seem to be tight and the plates centered and move freely, but when shinning the light through there is a minimum amount of visible light. Would this be acceptable or should there be zero light visible? Some of the screws would have to be drilled out to replace the bushings. My second question is about jet size. According to Gill a T.B. professor, the #'s for the primary main jet is # 45, secondary jet # 55 and the power jet # 32 and use the yellow secondary throttle diaphragm springs. Are these the right #'s for my engine specs? Third question is about using dashpots on this setup. Should there be one, two or no dashpots with the OD trany? After reading all the Q&A on this forum this is an excellent place to look for answers. Thanks for any input you might have. Philip