225 Slant Six Manifold

pishta said
your issue is not the intake. Its the warped exhaust, that stuff happens. Is your issue possibly where the heat riser is on the exhaust (bright silver gasket)? There is a rectangle gasket that seals them with 3 long skinny bolts. You can take your exhaust off and lay it on a flat surface and check each runner if it sits flat on the surface ad are inline with each other as well. IIRC there is a 1/8" variance allowed (anyone confirm this?) on the runners but the heater must be flat as well as the intakes stove underside. The triangle washers allow the exhaust to expand in length and slide on the gasket so there needs to be clearance on the triangle washers between them and the raised portion of the exhaust flange. I got an exhaust too. PM me. Thats more bulky and cannot ship flat rate. You should be able to find that locally. Ebay even has them reproduced new for ~$130. Exhaust leak wont cause it to stall just make it loud and stinky.
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Yes, I believe the heat riser area Is where my issue lies. It definitely is loud and it can smell a lot more than other slant 6’s I’ve been around, good to know that’s likely where that’s coming from.

The stalling is incredibly strange to me. Sometimes, I can crank it, let it sit for a minute after revving it, and have no issue. Often times, however, i crank it and have to give it gas near constantly. I find that sometimes I can put it in neutral and not have to do that, the rpm’s will drop after idling for a few seconds, and all is good, but if it’s in drive it’ll stall after a few seconds of no gas.