what spark plugs to run on my rhs heads

finally getting back to my engine now that it is above 30 degree"s ,its going in next week and I was wondering 2 things they are 2.02 rhs 360x heads bowled with a victor intake 525 lift with about 300 advertised duration .automatic.3:23 sure grip with a tsi tranny m.s.d. 6 al will be gapped at .045 on 97 0ctain pump fuel out of my 650 duel feed until I get my 750 . vac secondairys d/f holly any true support on spark plugs would be appreciated . 2nd do the tti headers trueley drop in a 65 barracuda with a small block or is there a lot of work to do yet. 4-6 weeks out how much HP would I loose using shorties? yes $ always a problem here only 2 1/2 years behind with this last cold *** winter ,it just didn't pay to heat the shop, solor heat on its way I hope thanks for any info on plugs sorry to all of you that have been on hold parts will be available soon for your 64/65 barracuda"s slow but sure thanks fabo