next set of questions:

what would be the best head for lowest compresion? (i have a spare GX)

would i be better using the gx head even though i think it has more compression because its better ported and better valves than others?

could i use my twin SU's without boxing them up, or would they also require a box? (it would be good if i could just build a chamber on the air cleaner side of them for compressed air)

is anything like a copper head gasket required, and can this be used to lower compression?

i have a spare fuel pump capable of about 5.5 psi, so how much is a rising rate regulator worth? i bought an adjustable one (not rising rate) for $50 for my rally motor (see in avatar) are they much more and why wont a set pressure one like my other work well?

thanks heaps guys,
Michael