Minneapolis moline 403

[Underdog]

What's the biggest intake manifold a guy can find for a 403?

 

[VicS]

If you have 800 heads. Square intake ports.you can cut down a 800 6 cyl intake. If not cut down a 605 intake manifold. Or make one from exhaust tubing. But back when I used a 403 Lp manifold.