This gives me hope!! Haha.
Ive just finished a similar build.
Motor is all rebuilt. Fully balanced bottom end like yours.
Im alloy head, ported with bigger in n ex valves. Running the crow cam 214 214 cam with valve train kit. Electronic dizzy graphed for the cam, comp (9.8:1) and 98 fuel.
BUT, im still running single barrel and standard inlet n exhaust manifolds. Someone has put a 2 inch exhaust on before me and got rid of the front muffler.
Pulls hard from 2-3500, but just makes noise afterwards.
I know i know, im choking it. Sucking n blowing through straws.
Im changing to 350 holley, redline torker manifold soon.
Also have 6-3-1 extractors and will put 2.5" mandrel bent exhaust with one muffler.
I will dyno the car before n after for the laughs.
youve done well!
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