New to the forum, need MAJOR help with my 390

Welcome! The crank and other bits should be fairly easy to get in the for sale section of this site. If you can't find one, let me know, I might have a source. 

You did not say what trany is in the car and if it is any good or not but you may want to look into another motor/trany to drop in to get it running and in time do up the 390.

The block will most likely have pits on the cylinder walls that are too deep to bore to a max of .060 over or 4.225 so you may need at least one or more sleeves to save the block. Sleeves done correctly are every bit as good as the original bore so there are no issues there. If the rods were tight on the crankshaft they will likely still be good unless they too are pitted. Regardless, used 68/69 390 rods are still in good supply (many of us have multiple sets) and as long as you have everything rebalanced, should be fine.

Stock replacement cast pistons are available from EGGE and forged replacement 68/69 390 pistons are available from Bulltear, Alfano Performance and Diamond. Custom forged pistons are also available from the same as well as from Wiseco. And as BB suggested, you can use Wiseco's off the shelf 401 forged pistons not only on the K-1 rods but you can also mix and match 401 and 390 piece parts to make a kick arse engine as well.

If you determine that you need some new parts for your engine, be sure to post what you need here on the forum and forum members will no doubt be able to help you out. Rest assured, there are no shortage of options for your engine.

Edited by amx39068 - Dec/27/2012 at 9:50am

Really the only thing that is hard to get is sheet metal. There are some patch panels but nothing like the Mustang and Camaro completely new body shells made in China. Other then that you can get every thing else you can get for a either those cars you can get for an AMC . It just costs a little more money. Including fuel injection (Edelbrock and a couple others)  , updated suspension and brakes. There are a good 4 plus full time AMC part vendors specializing in AMC restoration plus another 3 or 4 plus parts vendors who specialize in parts for AMC engines. Also Summit has a pretty much every thing for AMC it has any other car , just not in it's catalogs, BUT in it's on line web site.   The people on this forum will be able to point you in the right direction for any thing you need. LRDaum
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wow guys, thank you for all of the information, I will spend a good chunk of the weekend doing more homework. I just finished tearing down the motor to the bare bones. Tons of pictures to share but i have to work in just 6 short hours so ill post them up tomorrow and you guys can give me your thoughts.