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'93 was the 1st year for a 360 Magnum. If you use a '95-up flex plate, it has the correct weight, but you'll need to oval out 1 hole a slight bit to make it work on the older convertors, because they changed to a symmetrical bolt pattern in '94. '95 was the 1st year for the weight being...

Er, I SHOULD know them, but I don't. Mark.

Have you tried free revving it up to the stutter? It's a bit dangerous due to the fan, but if you have a tach, rev it from inside and get the reading, retard the timing some, then rev it to the rpms where it last stuttered, if it's less, or goes away, either the distributor's advance mechanism...

Make sure you're getting oil to the rockers on that cylinder. With used parts it's POSSIBLE you got that one in 10 million chance of 2 going bad at once, but next to each other is astronomical, or by some faulty design. I'm not convinced you have a fitment problem, coil bind or such other...

I'll vote for an intake leak, as well. I will add that milling the heads may have had some affect on intake seal, especially if the intake is a used aftermarket piece of unknown history. I ALWAYS use the Blue Fel-Pro intake gaskets on the 340/360 smallblocks, (not sure if there is a 273/318...

That's 1 that would definitely be hard to figure out, but if a person trouble shoots a car correctly, it's bound to show up. Most of the time it is really simple stuff like that, but if it's not electrical or fuel, usually a vacuum gauge will help find valve train issues or any other low vacuum...

Despite looking different, they are the same balance and the pulley fitment is the same. pbd, I won't share my suspicions until you can get a vacuum reading, but I will give away a hint when I say "the biggest thing I want to know is how severely the needle fluctuates at idle." Mark.

The seal on the timing cover is removed and installed with the timing cover removed. Get your damper back on, time the engine, then throw a vacuum gauge on it and tell me what you see. I have my ideas what it can be and what the vacuum gauge does will say whether or not I am right in my...

The '86 block will be a fine core for your power level, any 360 is better than a sharp stick or a slant 6! See if the blow proof bell you're looking at is designed for the 153 tooth (11 inch) flywheel , which the 360 already has, if it is, then the flywheel behind the '86 360 will work fine...

I regret mentioning this, truthfully. There are stroker component kits out there which are basically a 4.00 inch stroke crank, aftermarket rods and pistons, all of which bring a .030 over 340 up to 416 cubes, some kits are reasonable, others are outrageous in price. In your case, especially...

Fstforward, the 340block/360 crank deal are the same mods as putting 340 pistons in a 360, the top of the 340 piston needs to be stepped to clear the bottoms of the heads, plus the wrist pin boss needs trimmed a little to clear the counterweights. Why do all that when the A/M makes good pistons...

2.02s kill torque, even with higher compression. If you're going to run it on the street, it's pointless to remove 1.88 heads and put on 2.02s, especially since you're not going to rev it to the moon. Old enough to drive and buy beer. Mark.

Uh, no, that would be the cupped snout washer, which aids in retaining the pump eccentric in alignment on the keyway. The thrust plate is the large plate with 4 bolt holes that the front journal of the cam rides near. Typically these wear a minimal amount over an engine's lifetime, so...

Scalloped pressure plates allow for bigger clutches. "Scalloped" means the innermost areas, where the pressure plate bolts pass through the mounting points, have been opened up to allow for a larger disc. A person can actually do this to a stock 9.25" PP and just buy the upgraded disc. The...

Only the Magnum blocks have the crank sensor at the passenger's side rear of the block. If it's complete, it'll have the tall "kegger" intake, also a dead giveaway. '92 360s were still LA engines. Mark.

Depending on how wild you're going with the 360, you really don't NEED to swap in a bigger flywheel and bellhousing. You can upgrade the clutch to a 10" scalloped pressure plate, some slant 6 applications used this combination. A competent clutch rebuilder can also up the clamping pressure by...

Yes, they are the same, the same in ALL respects. Including a high mortality rate due to cracking. They crack between the valves, usually bad enough that they won't hold a steel seat ring. Had a friend of mine recently go through NINE sets of heads to find ONE head worthy of rebuilding for a...

Another "bell on the cat" topic. People are interested in the product, but noone wants to be the one to possibly get hurt. We need more dirt trackers into Mopars, they aren't scared of NOTHING! As far as wiping out main bearings, I'd say that's not a plausible defense to not trying it out...

Replace fuel pump and filter, sounds like it's starved for fuel. Mark.

The poly 318 uses the lighter '782 rod, which is bushed, so it's easy to remove pistons. On the pre-'68 engines, the converter hub is smaller and most A/M convertors won't fit, but the crank can be machined for the larger hub. If you are planning on running a manual trans, the hub size doesn't...

1971-1974 uses the 3418496 block, but a few slipped out in '75. I wouldn't complain at the build you already have, @ 445 RWHP is very respectable for a 360 with a lot of stock parts still involved. A grenade won't blow if you don't remove the pin, so if the engine quits pulling at 5500 rpms...

Well, that's part of the difference. lol The 'O' heads, as with all small block heads beginning with the 3418915 (J, O, U, and Z) casting on, have wider lower head bolt bosses. Supposedly to help with head gasket sealing. 'O', BTW, some very early '68 "X" heads (2531894) weren't even cast with...

Bill, As much as I understand your theory, it has more inherent problems than fixes. Cut and dried, the strength of the block is in the cylinders, as much as the ring seal is dependent on the cylinder's thickness and resistance to flex. Most sleeves remove at least 1/2 the thickness of a...

You guys do know there are 2 versions of the '302 style fast burn head, right? '302 and '714. Either way, they are worthless junk that I scrap without hesitation. Mark.

Casting numbers are located by the starter and will also have the displacement and mold suffix, as well, for example: 3418496-360-12 c/n disp. suf. NOTE: Sometimes the suffix and displacement positions are switched. Additional information is also provided below the driver's side head...

They are very unique, from a restoration standpoint. The 'O' heads are technically correct for 1970 340s only and are 2.02 valved in stock form. On '70 340s there are 4 other castings that are technically correct, BESIDES the 'X' head. They are O, U, Z and 'J' castings. Some very late '70 340s...

If you are looking at the V-8 Magnum for excellent mileage, forget it, the very best I have seen is @ 18, not surprisingly, it was a non-over drive automatic 318 in a '92 Dakota, 3.21 gears, with a hollow cat. Overdrive, even manual, really seems to affect the mileage on them. A TBI or carb...

If you use the schematics to do this, it is CRITICAL that the flywheel being used is truly neutral balance BEFORE doing the mods!!! DAMHIK. Mark.

As has been mentioned earlier in this thread, a thicker cylinder seals better due to less flexing, that's the biggest benefit you would ever need. That having been said, if you wanted beefier pan rails and main bulkheads, the '88-'92 360 EFI LA block has pan rails that are at the very least...

The schematic is the same for either 11" or 10.5", but it's also "guess and by golly", you may get it right, you may not. Personally, I have a 360 flywheel for 11" from a pick-up and when I need a 10.5 I just go to a engine balancer friend of mine and he match balances the 10.5" one up to the...