SBC Mopar Single Plane Intake Manifold (P4452893)
The ports say it can't be a W2 or W5. It's for passenger car heads
Thank you YR.
50% true, here’s why....
The W2 head and intake are cast with oval ports.
The W5 has rectangle ports like a standard head.
You can use standard stuff but....
Both heads and intakes have wider bolt hole attachment points on the inside. The outer end bolt holes are in a stock location. There cast/drilled wider for the head (and by that, also the intake has to be wider) because the pushrod is moved over some. This gets rid of the pushrod pinch, the area looking into the heads intake port where the pushrod on stock heads protrudes into the runner. This hampering flow.
I had a fellow member sell me what he thought was a standard head intake. And just casually looking at it, I did t know until I went to bolt it up. (Big buzzer sound here!) Wrong answer! Not happening. LOL
In order to use a W5 intake on a standard head, the attaching hardware holes have to be moved over. The best way to go weld them shut and re drill.
The W2 also has the same issue BUT the oval port, as cast, mid align badly. Major work has to be done for a retro fit. Not worth it.
I had in the last posted pictures of the standardintake next to a W5. I marked the off set hole distance with a black sharpie. It is just a little bit off. But a huge amount of you try and bolt it on.
You could use a standard intake bolt pattern on a W5 by re drilling the intake.
It is major, not worth the effort for a W2 Scenario, building a standard intake to a W-2 head. Very hard. It is possible, but it requires a ton of work. In my honest opinion, skip it.