bigpunn421 wrote:sounds like its stolen. in ny if you have something like that thats not good
x2
Sounds alot like a Stolen engine. If in washington state and your car has to pass inspection you will loose your car if you have your serial numbers shaved off your engine.
The only place on the block I can think of that gives casting marks is on big tag next to the transmission as shown in this picture:
The head has casting marks showing when it was cast, however that wont help you as the head has been swapped.
Since its a LS-Vtec, double check and make sure the oil pump and water pump have been changed, as in different colors from the block. If not replace them and put on a new GSR Timing belt.
I believe there is some etching spray that police use that can be sprayed onto the block and they can see what was there. Since your engine is very possibly hot it might be good to get it from someone who is not police. On the flip side you might want to see if the engine has been stolen and if so get who ever sold it to you arrested, the down side of this is you will loose your car and money put into it.
Another tip, Most tuning shops in washington, will call the cops and have the block checked if its stolen if it comes in. Not sure where you live but just want to keep you informed.