170 stroker turbo build

Long rams are tuned for a particular RPM to get a normally aspirated ram boost effect. With a turbo you don't need to do that. You want short compact runners to reduce turbo lag. Since you are boosting it, just use the larger engine, save some bucks for the good parts you will need to keep it alive at higher boost pressures.
Or use a 170 and blow it to pieces at 10000 rpm!
No don't do that either.