Spark plug recomendation

Almost ready to set the motor into the chassis, and need to put plugs and wires on. What spark plugs should I use? the motor is 14:1 A429 alum. heads and will be on injected alcohol. RPM range idle to 7000. What other info do you need to get me on the right track?

Thanks,

Alan.

R5671A-9 NGK or AR-3934 Autolite will work.

Thanks Lem