351M???

[Daniel Jones]

> It is no longer front to back than a cleveland. A plus for the Pantera where
> the pullies of a 460 want to visit the driver.

Yes. I know of several 400's that have been built or are being built
for Panteras. Several are strokers (one is 434 cubes and the other is
438 cubes) and one is a standard stroke 400. Before I came up with the
Fontana aluminum block I picked up a nice 400 block with the small block
bellhousing pattern and was planning on doing a stroker with a set of A3
Ford motorsport high port heads like the one Roush did for his Autokraft
Cobra.

One of the Pantera guys dyno'd his 400 at Cobra Restorers, in Kennesaw, GA.
Here are the results:

RPM HP TQ
2000 158 415
2500 212 445
3000 274 480
3500 352 527
4000 431 566
4500 500 583
5000 543 571
5500 567 541
6000 577 505
6500 567 458

Here are the engine parts:
Ford 400 FMX block, bored .030", 4-bolt main
Stock rods/crank
Arias forged pistons
351C 4V heads, ported, 2.19/1.76 SS valves, 11:1 CR
Comp Pro Magnum 1.73 intake/1.8 exhaust roller rockers
Hall Pantera manifold
PME intake spacers
Weber 48 IDA's, 45mm chokes, Inglese needle/seats/circuits
Comp 32-771-8 Magnum roller cam
GTS Tri-y 2" headers"
FC 288R-10 cam (Part Number 32-771-8)
244/244 deg duration @ 0.050", 0.623"/0.623" lift, 110 LSA

> A stroker crank is now available that makes 434cubes from the stock block.
> That is 83 more cubes than the clevaland. Or another 100 ftlbs of torque.

The 400 crank can also be offset ground.

> And for heads, the heads that Jon Kaase used to WIN the Engine Masters
> Challenge bolt right on. The worlds best heads won't bolt onto your windsor,
> but they will a 400.

The CHI's are great heads but as to "worlds best heads" remember
many cylinders heads like the Motorsport C302B, Brodix BF300's, and
Kaase's own SBF heads were not legal under the EMC rules.

> Roush used to offer a lot of parts for the 400...he really liked it as
> a base to begin building a strong competition motor. He also built a
> few for a Cobra company a few years back, as I recall.

Yup. Before all the fancy SVO blocks were available, Jack Roush's own
Autokraft Cobra was powered by stroked 400 with SVO high port aluminum
Cleveland heads. An old Super Ford article ("The Cobra that Jack built")
gave the details. The article stated Jack wanted a torque monster and a
460 would have been his choice but no aluminum heads for the big block were
available at the time. To keep the weight reasonable, he decided to stroke
a 400 and use Motorsport 351C aluminum high port heads. Using a custom
stroker crank and boring the block 0.030" over, he was able to get 460 cubes
out of the 400 block. Adapter plates and a Motorsport high port intake,
(looked like an Edelbrock A331), were used along with a 780 Holley. The
cam was surprisingly mild, a hydraulic Comp Cams 280 with 0.530" lift (the
article mistakenly states 0.500" lift). Claimed output was 520 HP.

Dan Jones