Is this a good 340 combination? How much HP?

Do you think this is a good 340 combination? This motor is for sale locally and I'm thinking I should buy it. Not sure yet how much mileage is on the motor, but I'm going to find out. What does he mean by water jack filled?

1971 Mopar 340 4-Barrel Motor

Block: Mopar 340 block (water jack filled)

Deck Height: 9.00

Bore: 4.040

Stroke: 3.31

Crank: Mopar Forged (stk .013/.010 mns,.020 rds)

Rods: Mopar HP

Pistons: Badger, 10.5-1 comp. Tool steel pins.

Rings: C&A file fit

Oil Pan: Mopar 6 quart

Oil Pump: Mopar Performance

Pickup: Mopar

Damper: Fluidamper

Balance: Internal

Camshaft: Mopar 256/265 @ .050 camshaft

Lifters: Schubeck lifters

Pushrods: Mopar HP

Timing Chain: Mopar HP

Timing Cover: Mopar

Water Pump: Mopar HP

Head Gaskets: Fel Pro 1008

Cylinder Heads: Mopar stock CC heads

Valve Springs: Mopar HP (180 closed X 300 open)

Retainers: CV Products Chrome Moly

Locks: CV Products Chrome Moly

Seals: Fel Pro 11/32” Rubber

Seat Cups: None

Rocker Arms: Mopar HP

Valve Covers: Mopar chrome covers

Intake Manifold: Mopar Thermoquad spread bore

Manifold Gaskets: Mr Gasket #307

Carburetor: * Thermoquad (750 CFM) Carb.

Distributor: Mopar HEI ignition

Spark plugs: Autolite AG-52 [email protected]

Carburetor: Thermoquad (750 CFM) Carb. By The Thermoquad Connection