i bought a holley at a swap meet recently and the guy i bought it from said it was a 600 or 650 vacuum secondary. im not sure how to identify holleys since they are new to me but the carb look to be in good shape and was a little crusty so it didnt look like it was tampered with, the primarys and secondary both measure about 1 and 5/8 in. and i was wondering where i might find the part number on it

any info would be appretiated

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oil burning
brake squealing
2 minute painted
305 rolling timebomb

 

the list # is on the choke horn. holleys web site will tell you what carb you have from this number.

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85 IROC 350 11:1keith blacks,.555lift erson roller cam,1.5 crane roller rockers,edelbrock intake,holley 4150 750dbl pumper, nitrous oxide,full length heddman headers,true dual exhaust, 11"stall converter, 700R4, 3.73 locker