Fits 302 and 351 Ford Racing blocks

Used for Drag, Sprint Car, and Circle Track Racing

Unfinished combustion chambers, typical finished volumes range from 40cc to 70cc

Unfinished Ports - As Cast

Exhaust valve seat insert bores machined 0.050-inch undersize

Intake valve seat insert bores machined 0.050-inch undersize

Pushrod hole machining ommitted

Valve guide insert bores machined undersize - pilot diameter only

Premium valve seat material compatible with titanium valves

Added water passages between combustion chambers

Cast from 356-T6 Aluminum

Uses Motorcraft AGS-series spark plugs