got all the specs. 383 4 bolt main. dart pro 1 aluminum heads. 250/256 519/523 lift 110 lobe. 750 mechanical sec holley carb. car is supposed to be turn key 475hp before the carb and cam upgrade. this engine should easily get to 7k w/o a prob.

 

anyone else can respond if they have ideas

 

it is the piston rings. thanx for all your GREAT help

 

check the inturnals of the carb