Quote:

Not my statement but a repeat of what an engine builder that has worked with both heads told me.

These were W9-RPs and SB2s. He said he used they same program on his CNC to port both.



Somebody misspoke. The P7 and SB2 can share parts of the same program. The big difference is bore spacing the Mopar has a larger bore space. You use the same CNC program and the valves are going to be out of place on the end cylinders by a large margin. The W9 RP is no where close as it is a wedge design where the SB2 is a canted valve arrangement. The intake ports are not even in the same ball part. I'm told the SB2 and P7 share the same port on many CNC programs.

Leon



Leon,

Thansk for clearing that up.

I was under the impression that the W9 and SB2 were comparable and run at the same time in the same Race-Series.

With the P7 and SB2.2 being close to the same and again run at the same time under the same series.

I did find it odd that Mopar would go from a W9 to P7 name label and Chevy would only do a SB2 to a SB2.2 insinuating that a SB2.2 would just be a slightly different head than the same ole SB2.

Either way I know what my next set of heads would be if I stayed Small block.