I've found out that the 2003 to 2008 engines had 9.6 compression.
The stock stroke is the same as a 360....3.58 inches. A longer stroke can push the CID to 392-400+ inches.
I've looked at rotating assemblies. Some list some oddly low compression ratios. I wonder if these are for people that intend to run a supercharger?
More cubes would allow me to retain the axle gearing as is.
I do not want to give up reliability and durability just to gain power. I know that as the stroke gets longer, the piston sometimes gets shorter. I don't want hockey pucks for pistons that wear out the rings in 40,000 miles. I'm at 358,000 with this stock engine. If long term durability is an issue with an increase in stroke then I'm sticking with what lasts.
I put almost 100k on a 434ci(4.03x4.25) 5.7 in my 08 300C, short block still looked good after we pulled the heads.
If you want to keep the "outside" looking stock , Intake Manifold and all except legal headers, your best bet is
https://www.performanceinjectionequipment.com/ for the older heads , you will not find a better ported pre 09 head......these guys legitimately put out a 320/340cfm head, depending on how happy the checking bench is @28hg
Comp cams 268h sounds stock and I can tell you it'll pass PA's smoger test with a good 87 OCT tune.
OR
https://www.high-performance-engines.com/product-p/sp97.htm with PIE heads your Intake set of JBA Headers Cat4ward headers and Comp Cams 268H it'll make around 430-440FLy wheel HP ......... I know that combo can run 12.60s @ 108-110 in a 06 4X2 RCSB Ram 1500....with the truck intake with the timig cover cover changed over and the useing an 06 auto Intake that same truck ran a 12:45 and with a Mod man with a top made by Joe Ocone(OCP manifold guy ) it went 12.21@114 the runs were either at Island Dragway(NJ) or Maple Grove(PA) .......all runs were on an 89 tune with HP tuners.
Granted the out of pocket cost close to 7k and ATK will sell you the short block with the cam installed........as for running the MDS on the comp cam, it can and has been done , it'll will be down about 20hp/30ft from the 430/440hp #s from above the MDS lifters lose about .020 travel when you get above 5700/6000 rpms,
The ATK short blocks are well built and take a hard core beating well.
