Since I don't want to derail-highjack someone else's build thread I'm going to start my own.
1) My 401 spun a bearing and is done....
2) This will be my first individual build...
3) I'm new to AMC and their idiosyncrasies...IE oil pressure and drain back issues I've read about
4) Call me stubborn, but I'm not gonna take, what I feel could be, the easy route and drop a SBC into it.
The CJ (see profile for specs) is going to remain primarily an occasional daily driver that I want to be reliable and capable of moderate off road use.
The PO did the 304-401 swap and the 401 appears to be all OE. Based on the block (3198951) and head (3216090) appears to be of the '73-'74 vintage....which goes with the build tag on the valve covers (606Z21), which I'm told translates to June 21, 1973... Z denotes 401.
That being said, my research for similar builds had led me come up with this "preliminary" spec sheet:
Providing the bore just needs a hone, new .std pistons. I'm undecided on brand, thinking cast will do......I want to keep the comp around 9:1 (8.5:1 is stock I believe)
Re-use stock forged rods if possible.
I'm assuming the crank will need to be turned .010, will deck the block as needed, and hope to balance the rotating assembly.
Heads will be rebuilt...port matched
Edelbrock Performer Intake (EDL-3731)
Unsure on carb just yet...Holley TA 670...?
And for the most important, most debated piece...the cam. As of right now I'm leaning towards a Comp Cams XE256H kit from Summit, mainly because it comes with lifters, valve seals, timing and roller kit ect.....
MSD HEI with 6AL
....and of course all new bearings - seals - hoses and gaskets.
I'm sure I'm forgetting a few things, but that's basically it.