Big Block Chevy heads are popular for truck pulling, off-road and restorations. We don’t see any BBC motors in circle track any longer.
We work on many types of BBC heads including factory Chevy Oval and Square Port, Dart 308 and 345 Square Port, World Merlin and Engine Quest BBC heads.
Used factory Chevy heads, Oval and Square Port, usually need to be rebuilt before getting into any air flow performance improvements. After the heads are made “mechanically sound” from cleaning, magnafluxing, pressure testing and new valve guides, we can look into porting the heads for additional performance.
We also do “disguise work” to make aftermarket heads look more like factory heads.
SST Porting to Big Block Chevy Heads;
Stock Chevy production Big Block Chevy Oval Port heads will flow 250 cfm on the intake & 170 cfm on the exhaust. After our SST Porting, the heads will flow in the 300 cfm range on the intake and 195 on the exhaust. Typically, we are using 2.19 x 1.88 valve size with the SST Ported heads. The stock Oval Port heads have 2.06 x 1.720 valves.