Gasket issues..... need help finding

Ok guys. Needing help. Looked around. Cant find jack crap... I need the Intake manifold gasket part number for a TBSS ... IF they make one I need the Felpro gasket number or a link to where I can order one. Just looking though I have seen ls1 intake manifold gaskets. Nothing for the ls2 in general let alone the TBSS manifold. Also need to know the gasket that Pace Setter sends with their long tube headers.... Felpro if possible.
Reason for the felpro part is the man porting my headers wants to use the gasket as a template to ensure the correct ammount is ported and not a half mm over it. Only header gaskets I have found is for a vortec which says square ports and then for ls1 says round ports... Which one of those is needed. Ive not taken the headers off the truck although the headers are obviously round I havent looked to see if the gasket was round or square. IF they are square am I going to see problems by using the round gaskets for a ls1... I've never really looked into any of this indeapth... So forgive if the questions are dumb....

wouldnt all intake mani. gaskets be the same for the cathy port heads? :confused:

and the exhaust gaskets are round, if that answers your question

what mitch said

The gaskets are the same.

That helps a ton gents. I had the thought they were the same being all things are interchangeable. BUT they have different sizes listed... Ill figure it out. Ill call summit and get the gasket for the exhaust and intake. Use the part number and go from there with the heads guy.

just go to oriellys or wherever, they had them in stock when i needed a set