10.8:1, 264/256° Bigport

[jondee86]

I haven't run that particular combination of parts, but essentially it is no
different from putting a bigport head on a smallport block, and that has
been done many times. You end up with a high compression bigport that
will respond well to bigger cams.

Since you will be running it on a bigport ECU the fueling won't be far off. If
you have an O2 sensor plugged in, the ECU should be able to compensate
well enough for the modifications. Better still if you have an AFM setup.

And you will need to experiment with cam timing to get the best results
for you style of driving, so definitely a good idea to get some adjustable
cam pulleys.

Cheers... jondee86

PS: By redtop I take it that you are referring to the later TVIS engine and
not to the smallport engine ?