Originally Posted By madscientist
If it has the mail box top don't use that top. Call edelbrock and order the STR top for the SBC. It bolts right on, even though edelbrock says it won't. You don't need 15 gallons of plenum.

Correct,or you might find a smallblock chevy edelbrock tunnelram with the smaller plenum at a swapmeet or in you local ads for even less.