whats my Horsepower gain with these mods?

Okay guys, so let me get this straight: The consensus/implication seems to be that adding a 2bbl and better exhaust to a slant six isn't worth the time and effort???? What hobby is this???

The OP didn't state any specific end goals (which, yes, he should have). He was just asking how much power he'd get. Yeah, if he was hoping for 50+, then he's gonna be disappointed, but that's for HIM to decide. I feel like our job is to give him the facts.

The prevailing attitude around FABO always seems to be about max power for the least money, which almost inevitably leads to comments about either a V8 swap or boost. Believe it or not, I don't have a problem with either one. But is there no room anymore for just wrenching on a six for a few ponies? What about someone trying to learn the basics, and just wants a fun driver? Is slantsix.org the only place for guys like that?

Lemme put it this way. If the OP had said he had a 318, and wanted to swap in a 4bbl and add duals, he wouldn't get HALF the negativity in this thread. Sure, he'd get the requisite "need a cam and headwork to get the full benefit" comments, which are all true. But haven't ALL of us dropped a 4bbl and duals on a stock engine at some point? Would any of us say now that it was a waste of time? Even without "the full benefit", I seem to recall feeling a lot of pride when I was done, and the car was a LOT more fun. To me, this is exactly the same thing.

I expect folks to be realistic and try to manage the expectations of the newbies. That's our job as "been there, done that" veterans. But jeez, have we given up completely on positive encouragement?

I didn't dyno my Swinger before or after my Super Six and Dutra Duals swap, and frankly, I don't care if I gained 2 hp or 20. But it was DAMN sure worth my time and effort, and I recommend it to ANYONE with a slant six driver, but your mileage may vary.