(Click on the photos for a larger version)
Ok, so things never go to plan! I was expecting the block and heads to be gone for a week or so to let me start on other things, but this morning I picked all three up, completed. I walked in to see how they were going, and was asked if I knew about this... and so I turned the heads up to reveal the underside.
My original head has been heavily ported and polished, plus oversize valves fitted for a much higher flow. The quality in the extensive work is there, you can clearly see a huge difference. All the burrs have been removed, ported for a much higher flow, oversized valves for a higher flow also.
Here you are looking into a port of the spare head, in standard trim. Rough, restrictive.
Same photo but in the original head, smooth, high flowing.
We didn't pick it up at the time, but side by side, you can clearly see the difference in valve size.
The block, all clean and pretty.
Next up is to send the block and head away for testing and machining. But that's not where we stopped on the car...