anyobody have experience with their all aluminum 1.5 RR's. I guess they recently came out with a narrow body version that is supposed to fit under the stock centerbolt valve covers....pt#778-66914 (Jegs)

they specifically say "for centerbolt valve covers" on the 1.6 ratio RR's but dont mention it on the 1.5's. I want to keep the 1.5 ratio b/c my valve springs are about maxed out as it is with the cam alone.

So, do you have them and do they fit without modifications????

 

You should just get the 1.6's. And then get new valve springs. The gains will be worth it. New springs shouldn't bee too much extra, depending on which ones you buy

 

not sure on the piston to valve clearance either....and the motor aint coming apart to find out. I measured when I assembled it but dont remember what room I may have left.