Where'd ya get those specs? Stock from GM catalog, correct?
Interesting seeing what flows where on different heads? Some surprises.

Also, 317 & 706 are different in terms of CC's. Denali on 26's take a look at the very info u posted.

Another thing, if concerned on MPG's & you're thinkin heads, & a cam, do a cam swap & you'll see how much you'll lose there. I know I lost a bit.
But I gained in a different way.

 

found it on this website...BUNCH OF GOOD INFO THERE THE LINK IS BELOW
https://www.performancetrucks.net/fo...d.php?t=434396

i'm not looking on the .600 lift cause i'm not gonna go much over a .550 lift as well...

 

Great info there...good job searching too

 

I remember that thread. FastBrick knows his ****. I think a Mod was supposed to do a casting sticky.

Yes, I wasn't implying to look at look @ .600 lift. Or only that. I could be wrong, but (Billy) don't u wanna have good flow #'s at the lift your cam is at? The 243's & 317's have better flow #'s, along w/. those bigger I&E valves, while the 706's have the smallest chamber of all. I noticed the 243's are nestled almost in the middle of the two in terms of chamber size.

 

its what happens when your girlfriend is cleaning your truck and she breaks one of your valve stems on a 24" wheels and ALL the wheel shops are closed till monday

 

O'yea...

also i have somewhere between 3-7 sets of 706 heads on core motors i have swapped out for people... is the reason why i am leaning towards the 706's

what would my compression be with stock gaskets and the 706's with 58cc chambers?

 

You're chasing a white zebra with those 24" wheels and MPG.

I know when I went from factory 255/70/16 to 285/60/18 I was shocked at how much power it sapped. I can only imagine going from 16s to 24s.

 

only chasing "better" MPG

and i can't afford to be a fast 4door BUT i can afford to be a semi quick 4door on 24's...

 

just put a turbo on it...that should do the trick

 

18's made that big of a diff. for you? That kinda ironic, 18's or maybe 20's are what I may go to for brake clearance ( alot of brake). It's the only reason I want 20's cause I'm not into bling.

There's a better chance I'll go w/. 20's than see a white zebra. Never heard that one...white zebra.