headers for 340 stroker

my current combo is a 340 .30 0ver 4.00 crank i beam[ rods not sure on size]basic 416 flat top pistons pro comp heads 65cc ported .air gap intake and a old 700 dbbl pumper. i have not pick a cam out yet looking at voodo cam solid 272/280- 546/566 or 280/288 -566/586 need to figure out the comp .727 trans 9''converter 410s out back 28'' tire