I rebuilt a 62-327 block and the internal parts are new. The heads are cast 202/160(?) breathing through Hooker headers and 2 1/2" pipe. On top is a Edelbrook manifold with a Holley 650 duel feed line dbl pump. The disitributor is 63 ventage with Mallory elcetronic guts and a stock coil. The 62 block has a hole for the crank case vent tube/road draft tube. I placed a plug in the hole when I preped the block for rebuilding. A PCV is on the right valve cover and feed into the intake manifold. The other valve cover has a breather filter. Crank and cam timing were set by the rebuild shop. Timing is set at 12 degrees BTDC.
Symptoms: Engine runs rough for approx 5-8 min when first started and after warming up she will stall. Bottom line is, the motor does not run smooth and stalls after being warmed up.