Jetsizes For Holley Blowthrough

I've got a 350 cfm, had choke horn removed and the linkage hole sealed... solid flaot... basically as boost prepped as I want to do since next winters agenda is megasquirt. That being said though, I am ready, parts wise to assemble and tune, but I have no idea what jet size to start with? or fuel pressure... I have a gauge, what do holleys usually like? I was gonna, provided no assistance, start it off at 4 psi of fuel pressure.

MOstly im wondering about the jets cause I dont even know a baseline for N/A... it's a 250 btw.

Noone?

here's OEM NA jetting info from the horses' mouth:
http://www.holley.com/0-4412C.asp
http://www.holley.com/data/Products/Tec ... -7rev7.pdf

As far as applicable to turbo for the small block six, your related experience hopefully will help the rest of us on the forum . I'd suggest giving it a try , to get a baseline A/F, then worrying. There's so much 7448/4412 info and aftermarket vendors and parts it's hard to figure where to begin,

most turbo forums will point you to a site referenced: hangar18
http://www.hangar18fabrication.com/blowthru.html

http://www.hangar18fabrication.com/fuelpump.html


have fun

('used a stock jettted 7448 350 CFM - 2300 series Holley 2Bbl on a stock '71 Maverick 170/5spd. It ran great - but eye watering rich on the little 170. Also used 7448/350 on a heavily modified 250 Tri-Power with outer ports blocked (only for initial engine fire-up and cam run-in with reliable carb ). Currently run a 4412-C (Factory HiPo) 4412/500CFM on the 250 - also never opened up but should have #74 mains, runs great with big cam. Now looking at 2300's for a competition blow-thru engine or something like that... .)

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Ive read hangar's website so many times now I think I could recite it in my sleep lol. I guess If i can get it idling with what comes with it, I should be able to tune it after lol. Thanks!

Ill be sure to do a write up once it's all said and done.