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way to much unless you are gona run in the 5500 to7500 rpm range.street driven non race cars especially 350 auto cars stay in the 1 1/2 to 1 5/8 primary tube the small tube headers are good to about 6500. 1 3/4 are for big inch and race engines:nanawrench:just like running too big a cam or carb on a street engine you will loose scavanging at low speed
 

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set the timing to about 10 to 12 degrees and around 32 to 36 total.if you have you vacuum advance hooked to manifold vacuumit will dump your advance when you crack the throttle and make it doggy especially with such a short gear.what trans do you have if its a powerglide with thier 1.7 first gear they have to be tunned correctly . a 630 /650 qjet will give you a lot better throtle response than any carb out there.the edlbrocks are a pain to tune if off.hook your vaacuum advance to a ported sourse so when you open the throttle it adds timeing not take it away
 

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the ported vacuum is above throttle plate vacuum.on a qjet it is the one sticking out from pas side front corner.depending on the vintage carb there are several ported nipples some have one to the right of the fuel inlet.on any other carb look for a nipple with no vacuum at idle :nanawrench:
 
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