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L2295 with 906 heads will give you 10:5-11:1 compression. We used to mill the domes off the 2295s CH WT Pin type Deck ht L2266F 1.991 876 225 0 flat top .090 L2355F 2.061 872 225 -7cc valve notch...

Its measured from the flat part of the 2295. If it had the same compression height as the 2355, with the dome you would be looking at over 12:1 compression with an open chamber head. The 2295 is about .050 in the hole. With an open chamber, somewhere around 10.5-11:1 comp. We used to mill the...

Sounds like the Speedpro pistons could actually be the motorhome replacements. L2388 ........... CH.........WT.....PIN..... CCS.............DK HT L2266F 1.991.....876.....225.....0 flat top...... .090 L2355F 2.061.....872.....225..... -7cc..............020 L2388F 1.926.....819.....225.....0 flat...

440 here no problems. Shorten the outer column and add an access hole for #6 plug. These are from a B body. C body drivers side gives up a few HP.

Biggest problem is you need air circulation around the motor. I spent almost 2 grand on radiators, fans ,wiring, relays and it still ran hot. We had to vent the radiator support a lot. Once we did a stock clutch fan and radiator worked fine.

For that size motor I would go with better flowing heads. 906s will cost you at least 50 HP over a modern head. Then you can pick a cam!

Vacuum leak for sure. How are the throttle shafts, are they worn? I bushed mine and still had a vacuum leak. Turns out the bases were slightly warped. I doubled up on the gaskets and the problem was fixed

I would have them all plated at once this way you guarantee a match. I had one set plated about 10 years ago and the other 2 years ago. The sets are clearly different.

.590 cam is a beast. I made 643 HP in a 505 with Trick Flow heads. too much for your setup. Try the .528 you'll be much happier

Now that you have decent flowing heads I would go a bit larger on the camshaft to reap the benefit.

Allstate Carburetors Home Page - Allstate Carburetor

Is that a stock piston? if so someone has to have one leftover from a rebuild

Pull the cam and id it before you proceed!

Keep this in mind. The Mopar specific grinds are very noisy. The XE275HL sounds like a mechanical cam. Very aggressive ramps for a FT hydraulic.

here read this: https://www.motortrend.com/how-to/mopar-440-update/ the XE275HL had about 24HP more than the XE274H in this particular test

The Mopar .528 will make 30-40HP over the XE274H. Its a very nice cam for the street. I run one in my 440 now. You can run stock rockers with the XE274H. I have run two motors with the XE275HL with no problems. .525 lift 231-237 @.050

I have a 7025 030 over slight scuff on skirt. You can have it if you need it.

This is what I have on file.......compression height is different. Measure them Part# CH Wt Pin Wt CCs Deck Ht L2295 2.029 817 250 13.1cc .140 dome .051 7025P 2.050 815 250 13.1cc .140 dome .051

The copper gaskets look like 426 hemi gaskets!!

B Body manifolds fit fine. Mild 440 ran mid 12s with them! Not to mention crap 516 heads.

Keep this in mind. If you buy aluminum heads you still have to have them checked out!!! Dont run anything out of the box. I bought my Stealths for $1000 and still had to have $450 worth of work.....recut seats....checking guides.....replacing retainers and locks. Now days with prices up to $1499...

You cant do a compression test with a breaker bar!!!!! Oil the cylinders and top end then get a starter on it. Squirting a little oil in the intake and exhaust ports will help.

Make Your Own DC-K Frame even stock mounts require the steering box mount to be trimmed back

The rockers and intake are worth more than what you paid. Plus the heads are most likely machined for double springs! Tach drive distributor and early chrome valve covers.....score

Check this out, its wild and slant six powered!!

Direct drive vs Belt driven

Here are original Cranes. They have the same grooves and oil holes. They were always a very strong rocker arm. If the 440 source are anything like the originals you'll be fine! There were also Crane knock offs made by Elgin or Crane made them for Elgin.

Schumacher sells a shim pack. The kit should come with a bunch of shims that fit under the mount. Different sizes which add up to over 1" of shims.

From what I remember the side with the two holes is for B and RB motors. looks like 4 1/2" vs 5 1/4" center to center. The other two sides are common.