just slapped a new holley 650 on the 59 apache(4175 q jet/spreadbore style) and it works great on my bored out 350 with an old spreadbore holley manifold. the only question is, aside from opening it up, what is good way to tell if my vaccuum secondaries are opening up? i also have a used edelbrock 1405 here is anyone is intested in rebuilding it, we can work something out rather than me just peddle it off on ebay.
