Quote Originally Posted by jeepsr4ever
Crossdrilling a AMC V8 crankshaft should NEVER be done without other heavy mods already in place.

Which other mods specifically ?


Quote Originally Posted by jeepsr4ever
We open up the last 3 mains to .339 which is .020 larger than the stock .319.



since AMC rods are fed AFTER the AMC mains -
and one reason people do not cross drill the mains is
because the rods are fed through the mains
and if you cant get oil to the rods you spin a bearing......
but you've rods 2,4,6&8 conceptually "somewhat starved
for oil during the power stroke, which probably is not desirable"........

how does one solve this AMC dilemma ?

Increasing the amount of oil delivered by the main galleries -
which could necessitate rifle drilling them out by how much safely ?

- and -

running a supplement oil line to the back of the block ?


might just add a can of STP and call it even =D>