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The AFB is a little small for that combo.
However, the AFB is MUCH easier for me to tune. I can have the jests and rods swapped out in just a few minutes and never spill any fuel.

I'll take the better street manners and economy of the AFB and give up the .000000001 second at the track you get with the Holley.

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I guess I better get a metering rod and jet kit for the AFB. I have a race in a few months

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Check what size rods/jets your AFB has & order an eddy strip kit w sizes a slight bit richer than current. Can lighten the counterweight so the secs will come in sooner and can remove the boosters and narrow the horizontle leg part and can narrow the throttle shafts/screws if you want to experiment w what you have & yes the AFB's (& clones) have better street manners but I would borrow the Holley again when the time comes to kick his tail (& take his money)

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You really need to find an LM1 or some O2 sensor to put in there to check it out. Just richening it up may hurt performance. The 625 tuned correctly ought to be plenty for that combo. But you're asking a lot against a turbo, i've seen some of those guys at Tulsa and it will be tough no matter what you breath through.

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The 625 is on the small side, & the 750dp is too much for a mild 360, a 650dp will work a whole lot better for your set-up, i took a basic stock (high mileaged) 360 with just bolt-ons in my 71 dart to 12.5 consistantly, it was so mild it would only pull to 5100 RPMs, now this was a magnum engine, if this honda is basically stock (with a turbo) you "should" take em, i won't say much more other then be awhare of these cars, they can go in the 11s quit easy & you won't see it coming till mid track .

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Might have to hide a bottle of NOS

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That was my next suggestion , never hurts.

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300 HP at the wheels in a civic is going to be hard to beat if he hooks up.

One of those weigh...2500 lbs or so & figure 2700 "race" weight unless he gutted it.

So that is a LOW 12 sec ride if he has all his ducks in a row.

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Those civics are lighter then 2500 lbs. i'll garuantee you, they are light, even if its not 300 to the wheels, if its pushing 300 FWHP it'll run hard, i ran 12.5s with 280-290 RWHP at 3200 lbs., that civic is a good 800-900+ lbs. lighter then my 71 dart, so your looking at an 11 second car if he can leave good on the boost & hook up, basically a clean run.

Here at our local track there were 2 civics running 1 night, both local guys, I saw 1 run on 3 weekends, the 1 was a plain jane no thrills, his best time was 11.5 @ 117 & none were clean runs, the other was a little "monster", it was in a sence "no thrills" looking, i know the guy personally, he has a local car lot, Its a single turbo, He could never get off a clean run, he mowed down just about everything at the track 1 night LOL, car only made 10.4s best ET, but the MPH was 138-142 , this car was tagged too.

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Nope.... 750DP w/ 28 squirtters, 72-78's and It'll get it done.

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I disagree, not for any mild 360, its just too much carb