Chevy valve in J-head

I have the +100 in my J heads, 2.02 and 1.60. As you said, just get the 11/32 guides for them. Make sure to get the matching single groove locks at whatever retainer degree you’re going to run (10 or 7).

Edit:
Doesn’t look like you can get a 5.011 length in Summit brand…4.911 is gonna be short.