Intake runner raise .100
Exhaust ports raised .750
W port
Conflicting info on Chamber cc's 1 chart says 115cc and the other shows 105cc.
Requires intake valves .200 longer than stock or valve spring pockets must be machined.
Pushrod guideplates must be ground for clearance. And a lot of times you have to shim them to get them right.
Most guys grind out the hump in the W.
Valve seats are too little for blown alcohol use and known to fall out.
Intake runner 380 cc.