1971 Plymouth Duster Crate Engine

The 410 is internally balanced, meaning you can use a neutral-balance flywheel or flexplate.

The 410 is internally balanced, meaning you can use a neutral-balance flywheel or flexplat

410 Six Pack Power
The peak power numbers shown below were made with 34 degrees of timing and the jets that were preinstalled in the carburetors. More interesting is the torque curve that hits 400 lb-ft at 2,750 rpm and stays there until past the horsepower peak. That's all four gears of tire smoke.

RPM	TQ	HP
2,500	387	184
2,600	388	192
2,700	395	203
2,800	408	217
2,900	419	231
3,000	428	244
3,100	439	259
3,200	445	271
3,300	453	285
3,400	460	298
3,500	469	312
3,600	474	325
3,700	479	337
3,800	487	352
3,900	487	362
4,000	486	370
4,100	487	380
4,200	490	392
4,300	489	400
4,400	488	409
4,500	486	417
4,600	483	423
4,700	480	429
4,800	477	436
4,900	473	442
5,000	469	446
5,100	463	450
5,200	459	454
5,300	453	457
5,400	448	461
5,500	441	462
5,600	436	465
5,700	432	469
5,800	424	468
5,900	415	466
6,000	405	462
6,100	398	462
6,200	387	457

The distributor uses a standard magnetic pickup that we hooked to an MSD box for the dyno testing. The engine included an electronic ignition box for installation on a street machine.
The distributor uses a standard magnetic pickup that we hooked to an MSD box for the dyno
The 273/318-inch engines are sometimes grouped separately from 340/360 engines because they have slightly different motor mounts. The new 340 block has provisions for both mounts, so it can be used as a replacement for any '64 to '03 small-block-equipped production chassis. That means the 410 is for factory-equipped 318 cars, such as a Duster. Another cool aspect of the 410 block is there are crank trigger bosses for use with fuel injection, so you can swap this short-block under your factory induction system if you are driving a late-model truck or something similar.
The 273/318-inch engines are sometimes grouped separately from 340/360 engines because the
The cam is a hydraulic flat tappet with 292/292 degrees of advertised duration (that's 248/248 at 0.050) and 0.508/0.508 lift on a 108 LSA. There are roller cams available for the LA block if you want to get that lift up near 0.650 and kill some driveability.
The cam is a hydraulic flat tappet with 292/292 degrees of advertised duration (that's 248