Trickflow Top End kits....Anything I should know before ordering?

I ordered everything separately myself including the o-ring heads. I had a headgasket blow which prompted the whole top end change and didn't want to do it again. I looked at Summit and trickflow's website which didnt list a kit with the o-ring heads. I say get everything separately in that case.
http://store.summitracing.com/partdetail.asp?autofilter=1&part=TFS-51400011&N=115&autoview=sku
these are the heads.
I also switched everything to arp studs instead of bolts too and wasn't going to use their attaching hardware. I wanted a double roller timing chain which the kit didn't specify what it came with and I didn't like the look of the rounded valvecovers. I rather buy what I want that buy a kit and just use most of it... You can go to their website and just quote the part numbers for the pushrods, cam and roller rockers. www.trickflow.com
Kevin