LOL! Oye!. OK, I'll take a sec. to shake those memories off,...........ahh, all better!
Well, what I'm getting at is take My stock over 140K '87 Dak, 1st year 3.9L V-6 w/a carb. Has the heart-shaped chambers a la "302" 'teener heads and stock squeeze of
9:1, runs on 87 pump all day even with a sure buildup of carbon & associated hot-spot & squeeze increases due to the mileage, even tho' the heads are iron the fast-burn
design makes that rule of thumb way off, Al-u-minimum would be able to go another whole point higher...10:1 w/o battin' an eye.....