Spark Plug Advice

Hope to drop the engine in my '63 Biscayne project next week or so...
Question is what spark plugs and gap would you gents suggest....
Basic specs on engine:
* 283 bored .60 with mild cam (Melling C400P-similiar to L79)
* HEI ignition
* ~10-1 compression
* 305 heads (450's)
* Edelbrock dual plane intake
* Edelbrock 550 cfm carb
* Ram Horn 2 1/2 Exhaust
* Running a 4 speed standard trans....

Appreciate any help.
Thanks,
Bob

 

With the Hei the plugs should be around .045 gap,,,305 heads have the small plugs so go to the auto store and get a set of plugs that fit the Camaro with the HiPo 305 with the dual throttle body fuel injection...

 

Thanks much....will do.