440 Differences

[Iceyone]

I have a stock and standard 1970 440 coming out of a 70 New Yorker, that I want to transplant into my 68 Charger this year. Besides the obvious difference in heads between a standard and HP engine. What other internal differences (crank, rods, pistons, cam) can I expect to find? The plan will be to tear down and inspect all components, perform a basic overhaul, replace the heads, stock intake and add headers. The engine has 58K miles on it and does not smoke. Also plan on using the 727 bolted to the rear of the engine.

[FLG]

Probably nothing 

If its a 70 its still going to have a forged crank, it will have LY Rods (only other rods where the 6-pak rods), std flat top pistons, heads might be different but probably nothing you couldnt find on any other 440 of the times. I wouldnt worry about what cam it has, if your going to do an overhaul might as well add a better performing cam.

[Cooter]

None on the 1970, 440 engine you mentioned....

There was one other little difference in the 440 engines beginning somewhere round 1973-75 or so, dealing with the center, thrust bearing...There is one year you can swap and be ok, but the other won't fit cause the center saddle in the blocks aren't machined enough to accept the different Thrust bearing....Like I said, no other differences in your engine though...

[BSB67]

Besides the obvious difference in heads between a standard and HP engine.

Heads are the same too

[stripedelete]

Besides the obvious difference in heads between a standard and HP engine.

Heads are the same too

So, it's just the pistons?

[BSB67]

Besides the obvious difference in heads between a standard and HP engine.

Heads are the same too

So, it's just the pistons?

The pistons are the same between hp and non-hp for 1970.  However, the CR in 1970 was lower than 1968 (i.e. the pistons are different between 68 and 70).

[oldkimmer]

...Ur charger engine[magmum] has single valve springs with a damper, hp cam, windage tray..........kim................

[Iceyone]

So if the heads are the same (906?) then why is there a 25HP rated difference between the standard 440 at 350HP versus the HP 440 at 375HP?

[chargerbr549]

The basic differences between the 1970 HP and non HP motors excluding the six pack motor, different camshafts, hi perf exhaust manifolds, different valve springs, windage tray and 6qt oil pan on B and E bodies, i'm sure theres more little things that I can't think of right now.

Kevin

[Iceyone]

OK, well that seems more logical. Before I bought the car the previous owner claimed the car was special ordered by his grandfather who had worked for a dealership and the engine supposedly was a "police" engine. I've never known of if this was an actual option or not. VIN code says I have a 350HP standard 440. I was mainly curious as to what it would have to do to make at least 375HP.

[Cooter]

375 HP? 440? Change the cam and valve springs....


450 HP? Cam springs, intaker, carb, headers, Pistons (Raise Compression)port heads...

550 HP?

All the above, but aluminum heads and stroker crank...
650 HP?

All the above, just more of it (Read Racing parts)...

Above 650 HP?
All the above, but with some sort of forced induction....