429 mild street build

Hi folks, yeah so I decided to fit all the parts I have exept the cam.I used a Comp Cams High Energy cl34 227 cam and new lifters.
I put it alltogether and it ran like a champ sounded pretty good too,but when I jumped in to go up the road it started making a Knocking noise.
Not loud but just enough for me to hear when sitting in the car. Driving up the road I gave it the boot but not going over 6k on the factory rev counter
when i slowed down to stop at the lights it cut out. It started right up again an I drove further where the noise got real loud and the car cut out again
and would not start.
Now it wont even turn even with a breaker bar on the crank nut.
I removed the stater thinking that it might be locked up or something but it was fine.

Any one have a clue as to what it might be?
The motor was running fine before,it was totally stock but in good nick.
I've read that the 385's has a oiling issue but my car ran fine before.
All I changed was
cam and lifters
heads
intake
gaskets
timming gears
oil and filter
plugs
water pump
I cant see how that would make it lock.It was only a short drive anyway.
Any help please guys?

cam bolt too long, now broke? locked up engine,did it quit? or you shut it off,and now it wont turn?

Hi I havent checked that yet I'm about to pull the motor but I just got home now.
I assume its oil related. the bolt for the cam is what was in the motor before.

Perana,

Just checking to see if you are alright, heard about the earth quake.................

Hi,yeah thanks mate.Fortunately I'm on the opposite end of NZ.Its very tragic though and my prayers and thoughts go out to all those In Christchurch NZ.
Thanks again.

Glad to hear your ok............. Sounds and looks real bad.

Yeah its allot worse than the one five months ago.It came without warning in midday.The CBD was hit the hardest.