Thread: 350 4 bolt build ????s

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Hmmm, sounds pretty close to a motor that I am building.

Heres what I am doing with option 1

350 4 bolt block torque plate bored and honed

350 cast crank standard mains and big ends

silvolite hyperutectic flat top pistons and moy rings

Rebuilt and shot peened rods with new ARP rod bolts

block decked to .010 deck height, check piston deck with a
trial prefit before doing this !!

Use .039 compressed gasket thickness head gaskets (felpro)

Open chamber 76cc heads with new valves and reconditioned
valve guides and H11 springs Single spring and damper crower springs are good part no 68311 set to run at 118 pounds on the seat and open at 350 pounds at approx .500 lift. Valves are 1.9 and 1.5

Give heads and valves 3 angel valve and seat job to clean up
airflow path.

Performer RPM manifold with either a quadrajet based carb
a holley 4165 spread bore double pumper list 6210

Lunati cams hydraulic cam pat No 30111 grind no H220-230
Intake .465 lift 220 dur at .050 lift
exhaust .490 lift 230 dur at .050 lift
110 lobe seperation
106 lobe centrekine
running 4 degress advanced

Stock brand new oil pump

good HEI distributor with aftermarket ignition module and hig
output coil

new rocker arms and pushrods with screw in studs. You
probably dont need the screw in studs but I like them
because I am just being me

Windage tray, crank scraper and milodon rear tray baffle if
you can get that all into your style of sump


Now this engine I have described will get you into the 1 horsepower per cubic inch ballpark with good headers and a smooth flowing 2.5 inch exhaust system. It is not a serious race motor but with that cam and head combination it will be a fun car to drive with a good broad torque range up to 5000 rpm

This will have a good static and dynamic compression ratio I would give you the compression ratio calculator but am clueless to how to get it on this thread. The calculator is located at streetrod drive in under compression ratio thread. The dynamic compression ratio article gives a good insight to whats happening in the cylinder under real working conditions and how cam duration and head compression work together.