We have wideband on it.

Havent dine plug reading. That is next step when leaning her out a hair

Be careful 12.5 is right near the comfy zone. new plugs - wot - pull tethers.

When you plan on installing blowers?

As soon as i find a good deal I can afford. Also. Plug gap is .045 7 heat range ngk

If your plan is to put huffers on, then do it. That's where your HP is, Anything else is just chasing your tail in circles. It's hard to build a low comp motor and get the HP out of it. That's what the blowers are for. IMHO what you have is 1/2 of a build.

You'll be happy you built low comp builds after you strap the blowers on. You'll be able to safely throw boost to them and make some good power. Just gotta bite the bullet for a while. You just need to keep in mind that the new components will soon compliment your builds.

I see you have a set for sale. We run a sherwood crank mount waterpump can that be used with that setup or does it require the mercruiser style

I've only seen one of those crank mount pumps on an older boat I owned and from I recall I don't think they would.

Your compression is too low , your cam is bleeding off what little cyl pressure you have . Iits not timing , carb size, tuning or anything else . You not only knocked 1.5 points of static compression but you also severely lowered your dynamic compression by a later closing intake valve .