Originally Posted by Mike The Canadian

Is your DOD hardware eliminated, I cannot recall from the swap thread

Originally Posted by spawne32

So hit a major snag with this swap thats probably gonna inhibit this from ever getting put on. When I went to check the gasket match against the felpro gaskets I intended on using, I realized that the felpro gaskets are showing that the two center ports are shifted by about a 1/16th of an inch. Now I probably could make this work just fine with some alignment adjustments using my bore scope, but the next major factor I realized was that these ports were cast larger then the 243 heads port size, in particular the width. Which presents a major issue in airflow regardless of the gasket match. While I could continue to correct for the offset, with out the heads being ported on the opposite end, im going to get a huge wall at the entry point. The 243 heads are roughly 25mm width where as the port on this manifold is roughly 31mm after the gasket match, which means I would need to gasket match the head side as shown in the pic below, which im just not willing to do on the car.







So what I wound up doing is ordering a ported LS2 intake manifold from complete street performance for $325, this was always my fallback option of this didnt pan out. Ill still have to go through with the valley tray swap, and ill be swapping the power steering pump. So ill be posting pictures of that, and im hoping that superglides manifold which he has waiting doesnt have this casting shift problem, some measurements will have to be made on his before I can determine if thats gonna be a good option for him to swap as well having unported heads.

My only conclusion as to why this manifold is cast like this is that that used a ported head already to cast it. It's identical in terms of port size to any number of CNC ported cathedral heads with the exception of the floor of the port being shallow, but that has more to do with structure of the cast. So ill leave this set aside for the time being, should I decide to do ported heads down the road this manifold would be an excellent upgrade to the ported LS2 as it has larger plenum volume and longer runners, and I can run up to a 96mm throttle body on this manifold as well.

Originally Posted by nick Ritter

did you grind away/ smooth out and blend the injector port opening or whatever you want to call it ? i got mine recently and it does not look anything like that around the injector opening much rougher should i blend that area in or just leave it ? noticed on the truck intake that they were separated

Originally Posted by nick Ritter

i also noticed how large these ports are, im in the process of porting my own cylinder heads right now. im wondering if i should try to port match these im worried ill break through trying to match these up ........... the gaskets that came with this are kind of ****.... they are the non silicone ones and im wondering if the silicone ones PP sells are smaller or better ?

Originally Posted by spawne32

felpro 1312-3 are the way to go as far as gaskets go, port match both sides to those.

http://www.jegs.com/i/Fel-Pro/375/1312-3/10002/-1

Originally Posted by nick Ritter

are these to mall for the intake manifold port on the PP intake though ?

Originally Posted by spawne32

they should be fine, you want to port the manifold to these so that they match the ports on the head better, the gaskets included with the manifold are not a true representation of what the port looks like on the head itself.

Originally Posted by nick Ritter

are these to mall for the intake manifold port on the PP intake though ?

Originally Posted by spawne32

You dont have to take it all the way to the edge but there is def alot of material there to remove. You seem to have the same casting shift I had but not to the same degree.