Port sizes can anyone explain this?

[JeffP1167]

I see a lot of adds for intakes. All have references to say 1204/1206 and maybe more. So what port size would be needed for a 90 vette?

 

[MYBAD79]

Summit lists all the dimensions when you look at gaskets. Find the stock gasket for the 90 Vette (and size) and go from there.... you'll want to port match if you buy a new intake....see what the port size is, choose the intake accordingly and then see what gaskets are available, get the dremel out and match the ports...

 

[JeffP1167]

Summit lists all the dimensions when you look at gaskets. Find the stock gasket for the 90 Vette (and size) and go from there.... you'll want to port match if you buy a new intake....see what the port size is, choose the intake accordingly and then see what gaskets are available, get the dremel out and match the ports...

Well I am not looking into porting anything but am looking into buying a used mini-ram for my 90 and see reference to minirams with different port sizes is all. I know I can't use vortech based parts.

 

[Twin_Turbo]

1204, 1205 and 1206 are fel pro sizes, yours is probably smaller than 1204. The 1205 and 6 are whole lot larger. A regular intake won't even seal off on a 1206 head, called medium race port.