Intake gaskets

**YENKO DEUCE REGISTRY** · #1 02-17-2017, 08:43 PM

I'm putting a square port intake on oval port heads, which gaskets get used - square or oval?

**SS427** · #2 02-17-2017, 08:57 PM

You would have to use the larger of the two, the square port gasket or you would have a very bad vacuum leak.

**earntaz** · #3 02-17-2017, 09:39 PM

Rectangle ...

**SuperNovaSS** · #4 02-18-2017, 03:44 AM

Looking awesome Marlin. Rectangle gaskets are what you need. Let us know how it works out. I have known many guys who have had great results with a rectangular manifold on oval heads.

Jason

**70LS6454** · #5 02-19-2017, 01:46 AM

Years ago I had 70SS Chevelle with an LS5 454. I installed a LS6 intake and used the rectangle port gaskets on the oval port heads. Worked well together without any problems. This was many years ago too.

Ray

**earntaz** · #6 02-19-2017, 02:10 AM

Did this on a 427 +.060 with a 850 puddle dumper -- worked great ... spun 6500 all day long. TAZ

**L78_Nova** · #7 02-19-2017, 03:23 AM

I did it like this

port matched with porting epoxy

**earntaz** · #8 02-19-2017, 02:37 PM

Looks like that will work. On my 427, I tapered the top of the intake port on the head to match the rectangle intake. TAZ

ds1 · #9 02-19-2017, 06:19 PM

Use the square port.
https://m.facebook.com/seth.brown.50...p_1f&mdf=1
These would work with a certain Felpro gasket.

**YENKO DEUCE REGISTRY** · #10 02-21-2017, 01:12 PM

Thanks all,