Roller Rockers 1.5 vs 1.6

And finally;
I have run a similar cam, the HE2330AL Hughes cam with 223/[email protected] duration. The advertised was 270/276/110 (@.008 tappet rise). I ran it with the 1.6 arms for a calculated lifts of .538/.549 .. This in a 367 with KB107s and .00 pop-up/.028 gaskets for a Q of .028 in closed chamber Eddies. I ran it from +5 to -3.
I regularly spun that engine to 7000/7200 for four years. I took it out every fall and tore it down for inspection, and retimed the cam.
In the second year, I decked it to .007 pop-up and ran the .039 FelPros/ Q was now .032.
In the Fifth summer I installed the next bigger Hughes cam; HE3038ALcam, 230/[email protected] with advertised of 276/286/110 (still .008 tappet rise) and lifts calculated at .549/.571 This cam is in at 110. And I'm still shifting it at 7000/7200 since 2004. The timing chain set was new in 1999, and has over 100,000miles on it. The PV clearance was never checked. Let me rephrase that; I cannot recall ever checking it. I wish I could tell you I played by the book but, I saw those deep pockets in the 107s and said, sweet.
Here was my test procedure;
with Lifter preload of 1/4 turn.
> Rev it to 6000, engine still idles.
> Rev it to 6500, engine still idles.
> Rev it to 7000, Whoops missed a shift and hit over 8000, and? , engine still idles; must be good-to-go.
> reset lifter preload to 1/2 turn , and just drove it, lol.
I just red-necked my way thru it and got lucky.

BTW
that 223/230/110 cam was a blast at 11.3Scr. I would still be running it if it hadna started dropping lobes right after an oil-change; nobody told me they were gonna take the ZDDP out! That cost me a lotta lotta money. Not to mention a teardown and clean-out. That 223 [email protected], is still my favorite all-time combo.