Hi Folks! My name is Dave and I have a question: I just got a slant 6 that was setup for racing (3 dual sidedraft 45 webers and other toys), and I'm trying to make sense of the casting number. On the left (drivers) side of the block there are large numbers (about 1" tall) 2121474-3 and smaller numbers 7 31.

I can't find a reference to this casting number, any thoughts?

Thanks!!

Dave

198? Doesn't match any 225 or 170 numbers I can find.

Nat

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1970 four-door Dart, 225/A-904/2.45 gears. 0-60 in twenty three minutes!

There is no "198" block. The 198 and 225 use the same (RG) block.

Interesting casting number you've got there. Have you got a digital camera? Can you show us a good, clear pic of the casting number you see?

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

sure, here's a couple. When I got the motor, I was told it was "special" from Chrysler. I figured "yeah, right..." Now it has me puzzled. Here's a couple of pictures:



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Interesting. It's definitely an early block (3 freeze plugs) but I'm curious: Is that plate-and-pipe arrangement where the water pump belongs your doing, or is that how the engine came to you?

2121xxx is a number that would've come up sequentially in the '60-'61 timeframe. Do you find any engine ID numbers stamped (not cast) into a boss aft of the water pump, or alongside the frontmost or rearmost cylinder? My initial guess is you've got a '60-'61 225 engine, but at the moment it's just a guess pending more info.

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

Definately no numbers stamped. The waterpump plate is a cast item, obviously made for this application, no idea of the source (I got the motor as you see it). The bore is 3.48, the stroke is 3.20 or 182.6 cubes (exactly 3 liters). Must have been for a 3 liter racing class. Here's a few more pictures plus some of the head (appears to be a modified 64-6 head):

The stamped numbers would be on the little protrusion on the right front on top of the block. (picture below the water pump thingie)

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

I think it had some sort of external water pump.............

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

That is a bored and stroked 170. The distance from the top of the timing cover to the deck shows me it is a 170 block. The water pump plate suggests a external cooling pump. I am wondering if this motor was used in a 3 liter boat racing class. Did you get any exhaust manifols/headers with it. They could be another clue. I would also like to see a better pic of the pistons. Pop up pistons, head studs, other parts. did you check the cam specs, yet? Looks like a good find.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Certainly interesting! The head casting number is standard (2206035, that is a '60-'66 head casting). The distributor looks to be a marine or industrial item. I agree with Charrlie_S, this started out as a 170 and not a 225. Where'd you find it?

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

The engine came from the California High Desert, near Willow Springs. When I got it, I was told it was used for SCCA racing. I can find no numbers stamped on any of the bosses. The distributor is electronic, but heavily modified (aluminum breaker plate, still with DyChem on it). I did not measure the cam yet. The headers appear to be one-offs, not a mass produced set. Intake manifold is a modified Clifford piece. Pistons are pop-ups, not sure of CR. Here's some more pictures:

I'm revising my guess: I think you found someone's racing engine.

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

Yes, but whos? special block and crank from Chrysler??? weird.

Again, a guess: Not special from Chrysler, but bored and stroked by some previous owner.

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

I wish I could find a reference to the casting number, that's the strange part....