What does a 74 slant engine weigh?
What does a small block weigh?
What does a big block weigh?

What I really asking is how much more do the V8s weigh installed.

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

Google is your friend.

http://www.team.net/sol/tech/engine.html

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Or here for mopar specific weight chart:

http://www.bigblockdart.com/techpages/e ... ight.shtml

re:slant weight.
puzzlement reigns !! which one of the links is correct? surely there can't be 50 pounds difference in slants. that seems like a lot. are some blocks more meatier than others to that extent?
I just work on the theory that they are just plain HEAVY !!

Rod

I have wondered about this myself. One thing I have noticed when swapping chevys from six to eight. The front end comes up with the v8. It may not be lighter but is shorter and most of the engine is behind the front spindles with the 8. The six has more weight forward. So weight distribution is better with the 8. I have not checked but this is very likely true with the slants verses the LA engines too. 475 or 525 lbs, no wonder they last so long!

I wouldn't be surprised to see variations of between 20 and 50 pounds on ASSEMBLED engines over the years, just due to the changes in various castings and thicknesses. Cast iron weighs a good bit per cubic inch, so it doesn't take much extra "meat" in a casting to start adding a lot of weight.

I know that the "A" engine blocks shed a lot of weight going from the early "A" shortblock used under Poly heads to the later LA shortblock, even though the block is essentially the same diminsions. And the big-blocks shed a good bit of weight as the 70s progressed, too. And I'm pretty sure the Magnum smallblocks were another step lighter than the 70s/80s LA engines too. And don't forget things like long-stroke engines weigh more than short-stroke versions of the same block. Look at the 360 vs the 273-340. That 25 pounds of extra weight is almost all in the crankshaft, and its mostly there to balance out the longer stroke.

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also I would assume that the 170 would be lighter since it has a shorter deck

Yes, a 170 block is almost 20 lbs less then an RG block.

I agree on the fact that the combination of parts has a big influence on the total weight. The SL6 had many engine parts that were made in both cast iron and aluminum so selection of material type can add or subtract weight. Intake, oil pump, water pump, top timing gear and thermostat cover are the "dual material" items that come to mind. (the Alm. 225 engine block is the best example)

There were also some sheetmetal alturnator brackets that save a few lbs. over the cast iron version most engines got.

As already noted, there were the "shaved weight" components that were "cut-in" as the years progressed. The crankshaft, camshaft, head and engine block are items that had heavy and light version. The exhaust manifold went the opposit direction, it started life as a much lighter piece and got much thicker (and "ribbed") as the years progressed.

Not really part of the engine, but the starter, alturnator and radiator assemblies can be swapped to lighter units that pull weight off the front of the vehicle.

Someday... it would be interesting to build a "porky pig" SL6 using all the heavy components that I have "passed-by" and throw into the shed over the years. I would venture to say that I could build 2 differnt Sants, one max. light and the other max heavy and see a 100 to 125 lb weight difference between the two engines.
DD

But there can, and is.

Forged crank vs. cast crank will make a significant difference, and remember also there were a couple of different block weight reduction programmes in the '70s, also the heads up to '74 weigh less than '75-up heads, also heads with air injection weigh more than those without...

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

also you have to consider the alum. block with as i understand it is extremely light in comparison

Yep big difference between cast and forged cranks, cast crank blocks are lighter. also old time racers always went with older blocks because of high nickel content in cast iron thus stronger block.or it maybe a wives tale.

The stamped-steel alternator bottom bracket for the spark plug side of the engine was a one-year-only deal (1961). I've seen a couple of them in cars, don't have any of them. Sounds like you do. Now here's a question for you: The 1961 sales and engineering brochures show a 1961-model slant-6 with a true-to-life turquoise paint colour (correct in big Dodges and Plymouths) and a true-to-life 1960-61 alternator housing (fins spaced twice as wide apart as on '62-up units—though in this photo the black alternator housing is an unreal touch) and other production-correct details. Have you ever seen this "Vee-bend" upper alternator slider bracket in real life? I never have:

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一期一会
Too many people who were born on third base actually believe they've hit a triple.