Generation IV Internal Engine - LS-2 coolant crossover question

I am puting together a SLP 402 shortblock with afr 225 heads, fast 90/90 setup. Car is a 2000 TransAm. Question is do I use the stock coolant crossover that connects to the front and back of both heads as the Valley cover that came with the shortblock was in the way a little and I had to tweak the lines to get them to fit. I've seen a crossover that just goes in the front of the heads from one to the other and each hole in the back plugged. Is this what I have to do and if so where do I get the crossover pipe ? from the dealer ? Also I assume the plugs would come with the pipe ?
Thanks
Ron H. :bang:

ttt... anyone ?

I used the LS6 style with two plugs for the rear and the connector up front. This was the same setup as my LS6. Now LS2 with LS2 valley cover.

I used the LS6 style with two plugs for the rear and the connector up front. This was the same setup as my LS6. Now LS2 with LS2 valley cover.

Ok thanks.