big boost cup
If you have the 197 head you may as well use the 197 inlet surely? If you are going jenvey plenum you could use the 172 head anyway.
i dont have either of them bits yet. what do you reckon would be the best out of that combo?
its going to be used as a drag car but still be on the road for the odd meet. its running mickey thompson drag slicks as i struggled launching it hard on track tires at 300 odd hp