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If i go blow through i have to change the regulator,pump,add a return line to the cell, pay to have the carb modded.

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You can't say, "I am ok with the cost of two turbos, two carbs, and two intakes, and I am a 26 year fabricator." And then in the same breath that adding a new pump, and running one return line as being reasons against going to the better carb system.

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From what i've read blow through has it's fair share of problems on the street with it's tuning.

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Compared to EFI maybe. But other then that, not at all. I have made one high speed air bleed change, and jetting changes... that's IT. Also, if you think putting two separate carbs WAY upstream, in a home made intake manifold is going to work better at idle/cruise then setting a carb on a regular intake... you're in for a surprise.

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So really, why shouldn't i do draw through?

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If you are honestly asking that question, you have clearly not looked into the reasons yourself.
-Cold starts can be awful... and considering you are in Michigan it's a real concern around here?
-Draw through severely limits your turbo choices because you'll need a carbon seal type to keep it from sucking oil at anything but WOT.
-There are VERY few people to help you when this doesn't work or has issues (since the rest of the world has abandoned this technology decades ago).
-Can't use an intercooler.
-No BOV system to protect the turbo/carb from backfire.

Etc...

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I have a friend that ran a draw through setup on a 350 nova back in the day and it was very streetableand fun to drive.

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My guess is the time that has passed between "back in the day" and "now" has faded your memory of just how bad it was.

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I was a metal fabricator, i am now a carpenter of 26 years and my Dad was a mopar mechanic for 36 years i know a little bit about building things from nothing.

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I don't think anyone questioned your fabrication skills. But since you've NEVER built or tuned a turbo mopar, you'd think you would be a little more open minded to those that HAVE done it.

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Just needed some help picking turbo sizes.
You guy's need to broaden your horizons

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Pretty gutsy comment to make to a bunch of people with a LOT more experience then you who are trying to help.

So you never answered the question. Aside from being stubborn...why WOULD you want to do a draw through.

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