My build:
Mega block 528
Have not done actual measurements yet comp should be 10.5-11.0 with flat tops.
Stage 6 stock port. (For now it’s what I got. Hope to upgrade in the future)
Looking at the Lunati solid roller 285/.600 110
Leaning toward 1.6 rockers but undecided.
Going in a Scamp, mostly street car.
I wanted to go bigger on the cam but afraid it would suffer without the heads being up to snuff.
Opinions on the 1.5 vs 1.6?

1.5 ratio puts less stress on valvetrain. That coupled with the fact that a solid roller already offers plenty of ramp speed and lift duration under the curve..... I’d be selecting a cam profile that got me what I wanted with a 1.5 ratio. That’s just my thoughts though, and there are plenty of guys here that know more than I.

You are better off asking a cam grinder what rocker ratio to use. My last cam I used 1.6 rockers to get the lift I wanted with a smaller lobe.

AndyF has done quite a bit of testing lately with rocker ratios. Look up some of his threads about it.

What do you mean exactly by "Stage 6 stock port"? Those are not heads you want to just take out of the box and bolt on.

I meant stock port window. Not max wedge. They were on the running engine. Just doing an overhaul. They will be gone through. Valve job at minimum.

Have they had any port work? If not, they need it. Most Stage VIs should have been sold as "porter castings" w/ no expectation of being used out of the box.

Has the guide clearance been checked? Not uncommon for even new OOB Stage VIs to have too-loose guides. Mine were and had to be replaced before they were ever used.

If they're even close to stock ports, IMO, there is no use in even bolting them on. Budget for having the heads gone through, or sell 'em for whatever you can get and buy something closer to ready-to-run. Especially since you've trying to feed a 528, those heads are not a great choice, IMO.

My suggestion is to re-evaluate the parts you have, your budget and your expected results. Sometimes they simply aren't in synch and require a change in direction. Better to figure this out early...

There's quite a bit of stage 6 info on this site if you search around.

Stuff like this:
https://board.moparts.org/ubbthreads/ubbt...tml#Post2423900

If you do the 1.6 ratio you will be forced to grind on heads way more than usual for push rod room--it is a PIA and in lots of cases you run out of room when working to line up rockers on valve tips while getting push rod room you need--it is balancing act that is made much worse with 1.6 ratio There is just zero need to do the 1.6 ratio
In books and in theory--and on some circle track and special applications there is a need and small gain but overall Mopars do damn good with 1.5 ratio
You will never feel any diff except in your brain after spending a couple of days getting everything to clear and line up---No way is it worth it IMO

I would run from the 1.6 ratio I would also be willing to bet it gains nothing in that application

You are in a position of being able to get the right cam and lobe for what you are attempting so just do that and all will be fine

Thank you for the replies. I’ll get the 1.5.