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I have a Dr Diff unit but haven't installed it yet. It looks like a nice unit, but has no markings/stampings on it

It is time consuming, but I would disconnect the end carbs so they don't open at all. In the center carb plug the power valve, and set idle mixture and synchronize the carb flow at idle. let the car warm up and drive it easy while monitoring the Air Fuel Mixture. It should remain fairly...

Power valve is just the timing related to engine vacuum of when the carb adds extra enrichment. The amount of fuel added when the power valve opens depends on the size of the holes behind the power valve. If someone enlarged the holes it could go rich when the power valve opens. The...

You can use a wooden dowl to hold the rods in the center of the old bore before machine work to check clearances. Some even machine spring loaded pins to do the same thing, just fancier and more adjustable. On the 440s with the 4.25" stroker crank, I only needed to clearance the oil pump boss...

Just take it with you ;)

Good part of 6.1 Hemi is no VVT and if on a budget can be converter to run with a carb and just an ignition system so don't really need an EFI computer. The NAG1 seems like alot of trouble at this point. If staying with the EFI computer stuff, maybe check if Holley Terminator is supporting the...

If going with an all new stroker kit why only a 451 and not the 512 kit? both kits are internal balance so need neutral balance converter and crank damper. If not using a race oil pan, the reproduction 6 quart hemi oil pan fits nice about flush with the lower part of the k-member. Depending on...

I removed the over center spring under the dash.

Just be careful driving in the rain. I had good luck with my 741 case 8-3/4" running RedLine LightWeight ShockProof Gear Oil (it is blue in color): Lightweight ShockProof® Just need to keep an eye on Driveshaft, U-Jonts, and axle shafts. I had a driveline vibration issue with the stock...

My '71 was an original 500 model 383 4bbl. The 383 4-bbl was the largest engine option in the 500 trim, and they actually were fairly low production, I think less than 2,000? I could look it up if you want -- looked it up: WP23N1... 1,615 TOTAL, 1,376 Auto, 187 4-speed, 52 3-speed. No hide...

Your right, each discharge is shorter, but normally the total energy per ignition event is greater with the multiple discharges. The cap rotor still limits how many times or how long, the ignition discharges whether if it is CD or inductive. The next cylinder is at a lower pressure, and the...

Not sure if the PRW stainless rockers are the same as the CAT stainless rockers, but my CAT stainless rockers (1.7:1 ratio) the roller tips and adjusters did not seem to be hardened correctly and started wearing out with only a few hundred miles on them? The rocker bodies actually seemed pretty...

When I first got the convertible with a stock (non0numbers matching) 440, it would run fine with no over heating is I drove under 50 MPH, when i tried to drive faster the engine would overheat, and once it overheated, it would not run cool again unless I let it cool down for a day. I tried the...

Electronic Ignition. If I'm going on a budget, the factory magnetic distributor is a good starting point, and then re-curve it for your engine combination, then use an HEI module on a heat sink (Cheap and simple.) I will use a chrysler type ECU if I need to, but they can sometimes be a problem...

Oil pickup tube needs slight clearance. Bottom of bores need to be checked for clearance, but rod bolts might clear depending on the rods used.

When I googled the bearing issue, Google shows that it was posted on 440 Source Facebook page, quote: "Every Mopar rod and main bearing part number is out of stock at every warehouse in the country, including Summit and Jegs." The post now says it was deleted, so it might have been spam?, but...

I haven't verified, but someone said there is a shortage of main bearings, and they are really pricy, like $150-$250 set? At least the 4.25" stroker cranks take GM rod bearings.

They run good, smaller bore than a 400 block, but there are more 383's out there.

Have a great retirement! You did a beautiful job restoring the radiator for my 1969 Coronet R/T 4-Speed Convertible.

As expensive as restorations cost, if it was done well and you wanted something to drive take to shows it might be OK, put pricy. As an investment, or other purpose (trying to get it all factory correct?), I'd pass.