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AMC 304/360 specs

304

 
304 360
carb 2V 2/4V
bore 3.75 4.08
stroke 3.44
bore spacing 4.75
Compression Ratio:
8.4:1 71-72
9.0:1 70
8.5 2V & 4V 71-72
9.0:1 2V 70
10.0 4V 70
HP *150@4200 72
210@4400 70-71
*175@4000 2V 72
245@4400 2V 70-71
*195@4400 4V 74
285@4800 4V 71
290@4800 4V 70
*220@2200 4V 72 (dual exh)
torque *245@2500 72
300@2600 71
305@2800 70
*285@2400 2V 72
365@2400 2V 70
365@2600 2V 71
*295@2900 4V 72
330@3000 4V 71
395@3200 4V 70
*315@3100 4V 72 (dual exh)
Connecting Rod Length: 5.875
Crank Journal --Main: 2.7472
Crank Journal --Rod: 2.0944
rocker ratio 1.6
Push Rod Length

7.800 70-71

7.820 72

Lifters Hydraulic .904
Intake Valve Head Diam:
Exhuast Valve Head Diam:

1.787


1.406

2.025

1.625 Early 70
1.68 Late 70, 72
Valve Spring Load: 85-93@1.812
Cylinder Head Volume (cc): 52.20 70, early 71
58.92 Late 71, 72
Head Gasket Thickness: .028 .048
Head Gasket Volume (cc): 5.59 10.95

Deck Clearance:

.012
Swept Clearance Volume (ci) 37.994 44.975
deck height 9.208

 

the cam specs are the same for the amc 360 and the amc 304

intake

Opens(*btc)

18*30’

Closes(*abc)

67*30’

Duration – deg.

266*

exhaust

Opens(*bbc)

60*30’

Closes(*atc)

25*30’

Duration – deg.

266*

Valve opening overlap

44*

Lift (@ zero lash)

.425