what spark plug and gap
my brother bought a set of the bbc pro comp heads for his street machine.468bbc;.he has the thumper cam and 10.25 comp pistons/team g intake and i think a 750 demon carb[vacume sec.]single pump carb...msd dist with the 6-al box...what plugs should he be using?[as to reach and heat range]and what plug gap