[Gregski]

I will be building the top end of my engine following the Chevrolet Performance 350 HO Engine (19210007) Specifications , that takes the guessing out of the operation

350 HO Engine Specifications:

Displacement: 350 cubic inches

Bore x Stroke: 4.00 inch x 3.48 inch

Compression 9.1:1

Block: Cast iron, four-bolt intermediate mains

Cylinder Head: Cast iron, 23º valve angle
Valve Diameter (Intake/Exhaust): 1.94”/1.50”
Chamber Volume: 64cc

Crankshaft: Nodular iron, 2 piece rear seal

Connecting Rods: Forged, powdered metal, 3/8” bolts

Pistons: Cast aluminum

Camshaft: Hydraulic flat tappet
Lift: .435” intake, .460” exhaust
Duration: 212° intake, 222° exhaust @.050” tappet lift
Centerline: 109° ATDC intake, 116° BTDC exhaust

Rocker Arm Ratio: 1.5:1 (flat tappet)

Timing Chain: Link Type Chain 0.762” wide

Oil Pan: 4-quart

Oil Pressure (Normal): 40 psi @ 2000 RPM

Oil Filter: AC Delco part # - PF 25

Fuel: Premium unleaded - 92 (R+M/2)

Maximum Engine Speed: 5700 RPM

Spark Plugs: AC Delco part # R43LTS (R44LTS actually)

Spark Timing: 10° BTDC @ 700 RPM

Firing Order: 1-8-4-3-6-5-7

I will post a parts list with part numbers and prices in another post.