HEADS difference between 98 and 04

[JoshuaGrooms83]

ok, im looking into heads now. Just wondering, is there a difference between a 98 cyclinder head and a 04 ls1 cyclinder head? I found a set of 04 ls1 heads on ebay for a pretty good price and complete. I know they have different valve covers, but what about the internals? anypower difference?

[ls1camino]

'98 heads have provisions for perimeter bolt valve covers, so you would need center bolt valve covers and coil pack mounting brackets.

[1fastcamarosss11]

you are looking for cast number 243 those are the ls6 ones best stock head. that i know of. if doing this swap you should get a cam at the same time too. get some stage 2 patriots. those will work well with budget in mind.