Engine specific production specifications!
Updated 10/30/99.

AMC Engine Specifications:
Here are some specs that are common to almost all AMC V8 motors.

Torque Sequence:

I usually find it easiest to just dip the end of the bolt into a fresh container of motor oil. And while ARP and other companies manufacture a grease/lube that they require you to use if you are going to install their product. But if you are going to be installing stock pieces, then this will throw off the torque settings.
Another thing that I learned is that a 50/50 combo of cam lube(looks like motor honey) and motor oil, work great for the assembly of most engine parts. It is not too thick, barely affects torque settings, and stays where you put it.
Some other critical torques:
All in lb ft
Intake manifold bolts
Connecting rod bolts (290-360)
(390-401)
Main bearing cap bolts
Rocker arm studs (to head)
Crankshaft pulley to balancer
Bellhousing to block
Flex plate to converter
Flywheel or flexplate to crankshaft


40-45
35-40
45-55
95-105
65-70 (this doesn't sounds right!)
20-25
25-28
30-35
100-110
Critical clearances & fit:
Make sure you have you browser set to full screen, otherwise the information will not line up.
These are not the original specs, but used for blueprinting.
Normal use is Stage 1. Street/strip is Stage 2. Full race is Stage 3.

VALVES:
Stem Diameter:
Stem to Guide Clearance:
INTAKE:
Head Daimeter

Seat Width

Seat/Face Angle:
EXHAUST:
Head Diameter:


Seat Width:

Seat/Face Angle:
PISTONS:
Piston to valve:
Piston to Bore:
Piston pin to piston:
Piston pin to rod:
Piston pin offset:
Ring Gap,top & middle:
Bottom
BEARINGS:
Con Rod:
Camshaft:
Main #1-2-3-4
#5 Rear:
END PLAY:
Crankshaft:
Rod Side Clearance:
Oil Pump End Clearance:
Block Deck Height:

Minimum Piston-To-Head
Clearnce:
|| Stage 1
||.3715 - .3725
||.001 - .003

||1.787 290-304
||2.02
||.055 - .065 290-304
||.040 - .060
||30

||1.406 290-304
||1.625
||1.68
||.040 - .060
||
||45

|| .250+
|| .001 -.002
|| .001-.005
|| Press fit
|| .062 Pos
|| .01-.02
|| .015-.55

||.001 - .002
||.001 - .003
||.001 - .002
||.002 - .003

||.003 - .008
||.009 - .015
||.0025 - .0065
||9.175 66-69
||9.208 70 up
||----N/A----
||Stage 2
||.3125
||.0025

||2.025
||
||.030 - .040 Drag
||.050 - .060 Road
||45

||1.625 290-304
||1.680
||
||.040 - .050 Drag
||.060 - .070 Road
||45

|| .100
|| .0065-.009
|| .001
|| .001
|| .020 Neg
|| .013
|| .015-.055

||.003
||.002 - .003
||.003
||.0035

||.003 - .008
||.014 - .018
||.006 - .007
||9.208
||
||.045 Steel Rod
||.075 Aluminum Rod
||Stage 3
||.3125
||.0025

||2.04
||
||.030 - .040 Drag
||.050 - .060 Road
||45

||1.75
||
||
||.040 - .050 Drag
||.060 - .070 Road
||45

|| .08 Int/ .12 Exh
|| .009
|| .001
|| .001
|| None
|| .013
|| .015-.055

||.0035
||.002 - .003
||.003
||.0035

||.003 - .008
||.014 - .022
||.006 - .007
||9.208
||
||.045 Steel Rod
||.075 Aluminum Rod

Swap-ability:
Crank/Stroke:
304 & 360: / 3.44
390: / 3.57
401: / 3.68

401 and 390 cranks are not recommended to swap into 290 or 304 blocks.
There will need to be some clearancing done to the block for the rods, and pistons skirts.
401 cranks will drop into a 360, or 390 block. And the 390 bore is the same as a 401, but the 390 block is not all that common.
360 and 304 cranks are the same stroke, so there is no reason to swap. And if you have a 290, then it would be easier to get a bigger block.
A 401 crank in a 360 block is a good combo. It ressembles the Chevy 383 set-up. But a little bigger, 385, without boring, and 390 at .030 over. But needs special made pistons or bushed pin holes in the rods.