Hi guys I tried to contact Kevin91z but it says it won't send due to his settings?? I know he is still a member as he is an administrator and his last post was in December. Reason is I found his post from 2007 about him swapping the lt4 hot cam and bigger springs for his zz4 with the stock aluminium l98 heads and he installed 1.65 roller rockers and it worked great with a final .540" lift. I was thinking of using scorpion self aligning 1.7 on intake and 1.6 on exhaust which would put me in the sweet spot of the max flow on my heads in537-ex544 My question was did he half to clearance the pushrod holes for the added 1.65rr angle and what pushrod Lenght/# did he endup with. I'm trying to save time and money from getting his info if possible. If anyone can help with their experiences and thoughts that would be great.

Thanks Eric

 

The ZZ4 heads have round push rod holes which shouldn't require any clearancing to run more than 1.5:1 rockers. As always, though, it's a good idea to check while assembling.