Quote Originally Posted by 39Deluxe View Post
Well, I've read a lot about them over the years and the theory makes sense. I got a chance to buy this one cheap on Ebay so I did. The engine is fresh. I finished it a couple of years ago but haven't lit a fire in it yet. I want to get it rolling and stopping first. It's a 355 with 9.3:1 compression,1.94 iron heads milled, port matched and street ported, and exhaust ports/chambers polished and cc'd. Cam is a GM Performance 214/224 with .442/.465 lift. My 69 short stepside has a THM400 and 3.73 gears so I expect it to be pretty strong off idle up to 5500 or so. Carb is an original Chevy Holley off of a '66 L79 327 I had restored be Bob Kunz in St. Louis. It will hit cruising speed right in the sweet spot of the cam so everything is well matched.

Don't you run this intake?

Tom

I ran it, it's in the garage, on a 400 I had in a 62 1/2ton. Stock 400 with a 650dp and headers and it was fairly stout for what it was. The Offy 360º is a single plane manifold with a split plenum and IMHO it gives you the best of both worlds. I also have it's brother, a dual quad, which I might run on my Vett someday.
I was curious with what you thought of the manifold.