SUM-K6400 Summit Cam and Lifter Kits
Cam and Lifters, Hydraulic Flat Tappet
Advertised Duration 272/ 282
Duration at 050 inch Lift: 214 int. /224 exh.
Lift .442/ .465 with 1.5 rockers
Basic Operating RPM Range: 2,000-4,500
Lobe Separation (degrees): 112
Camshaft Gear Attachment: 1-bolt
Recommended Camshaft Style Flat tappet hydraulic
Installed Height (in) 1.800 in.
Seat Pressure at Installed Height (lbs) 121 lbs.
Open Height (in) 1.300 in.
Open Pressure (lbs) 298 lbs.

This info below is for the KB184 piston

ENTER YOUR DATA CALCULATED DATA
Cylinder Head Volume (cc) 78
Piston Head Volume (cc) -2
Gasket Thickness (in.) .044
Gasket Bore (in.) 4.5
Cylinder Bore Diameter (in.) 4.35
Deck Clearance (in.) .08
Stroke (in.) 3.75
STATIC COMPRESSION RATIO 09.40
OPTIONAL DATA Rod Length (in.) 6.758
Adjusted Stroke (in.) 3.255
Intake Closing Point (degrees) ABDC @ 0.050 lift plus 15 degrees 49
DYNAMIC EFFECTIVE COMPRESSION RATIO 08.29

I didn't CC anything on my motor(I think....I repeat I think that this is close to the compression that I'm running) 76 block with 71 steel crank and 67 915 heads.