I believe a 1974 250 is non-integrated.

I checked Langdon's site and the split header is out of stock. Surprising! Give him a call, though, as that's what you really want.

From there get an Offy intake: https://www.summitracing.com/parts/ofy-5...ASABEgJiJPD_BwE

(you can find them anywhere. Try Ebay as well)

A Holley 390 CFM 4 bbl: http://www.jegs.com/i/Holley/510/0-8007/...AyABEgIrc_D_BwE

OR

http://fitechefi.com/

Then add in a cam, HEI, and exhaust system.

Odd that I can't find a Langdon header anywhere right now.

She'll wake right up then. About 200-225hp, 225-250 ft-lbs. Add in the right gearing and trans and she'll move along just fine. My old 68 Camaro could run circles around my buddy's 100% stock 68 327 2bbl car.

Last edited by gbauer; 10/16/17 10:05 AM.