This is how i built my dads 383 for a 68 charger with air and 727 trans.
1. 383 .030 over with kb 400 pistons.
2. stock steel crank and rods turned .010/.010 under
3. rods reconditioned with arp bolts .
4. deck hight corrected to .004 piston in the hole .
5. ballanced rotating assy.
6. out the box edelbrocks rpm heads .84cc chamber
7 .performer rpm intake
8. Comp cam HL275 cam with .525 lift
9. Crane gold rockers and aftermarket spacers
10.smith bros pushrods 8.25in leangth ball and cup
11.compression 10.2 to 1 pump 93 gas.
12.mp distributor with total limited to 34 deg .all in by 2000.
with vacuum advacnce connected .
13 .holley hp 750 vac secondary carb with no mods out of the box new
14. ptc 3000 stall .converter
15. tf1 shift kit in rebulit 727 trans with good koleen steels and red altos clutches type f fluid.
16 .clutch type sure grip 3:55 gear in the 8&3/4 rear end.
Car ripps a$$ will due block long posi burnouts from a standing still punch of the go pedal and feels like has unlimited top end power !
you cant drive the car to the top speed because it just gets scary ove 120mph
but all of this work i did my self for about 8 grand and change in the motor trans.
Dad has a car that has aprox 425 hp.and very driveable with ac on
pulls 13inches of vacuum but we do have a vacuum resivoir on the brakes .
pm me if you have any questions would be glad to tell you more about the setup.