Hi Thanks for the replys.
Hardend valve seats I have
I Use propane becouse of the cost .
Here in the netherlands It's cheaper to run a car on propane instead of gas.
propane = about 60 $cent a litre
Premium gas about 1 $ 60 cents

But what is the best street setup
Relative high compresion with only a little ( 11 ) psi boost.

or low compresion ( around 8-1 )
with high boost.
Thanks again Remco