99 accord 2.3 vtec SWAP....EXPERTS.....PLEASE HELP!!!!!!!!
 

I have a 99 accord ex 2.3l vtec 5 speed. 2 cylinders shot craps today due to worn rings. Has 251,000 miles but body and int. are perfect. So I'm fixing her.

I found a 2.3l vtec out of a 99 accord with 118,000 miles from local salvage yard that only deals with insurance totals. Cost 400+ tax (place has good rep)
Questions;
1. Does it matter if the salvage motor was a AOD?
2. the 6th number in my v.i.n. matches totaled accord.
3. Is there any particulars I need to focus on to ensure a perfect swap.
4. I hear people referring to their vtec as "F23A1" how do I know which I have?
5. Can I tell from a pulled motor that it is a match?
Let me know what info you guys need to help me make this successful. I will have replies forwarded to my phone

I apologize if this is in the wrong section, I'm new to the site. I want to Thank You in advance for any and all help!!!!!!!!!!

1. ??? What's "AOD"? Automatic vs. manual transmission doesn't matter. If you wanted to use the automatic transmission, then you should get the ECU from that donor car.

2. Good.

3. (see #4)

4. Engine type is stamped on the front of the block, alongside the exhaust manifold, right up against the split line between engine & transmission. Flat surface with stamped serial number. First line should say F23A1 in both cases. Even better if the 1st digit in the second line (block serial #) matches.
F23A1 = VTEC
F23A4 = ULEV VTEC - California car has a whole different wiring harness, so post back.
F23A5 = non-VTEC, for example from an Accord DX

5. (see #4)