I'm not sure if this is in the right section. Anyway.

I found a b20b motor in the junkyard. It has P8R-7 stamped on the head along with the 9/7. Apparently it's the high compression one? Also, I checked behind the block and it does have a sensor with one wire coming from it right in between the oil filter and alternator. Knock sensor? I heard the knock sensor is the clue to figure out if it is high compression motor. The transmission is still attached as well reading YS1-1052368 or it can be a 0 for the last digit. Couldn't really read it out. Any idea if this is the high compression b20b and which transmission this can be?

I'm asking because for one, I don't know. Second, this place wants $311 for the block and head and $175 I believe for the transmission. As of right now I have a high compression (PR3 pistons) b18a1 matched with a GSR transmission. My plans were to pick this up and go b20v. Or just have as a spare motor since I find it quite cheap.

Any inputs?

 

Also, it's in an EF hatch. 88-91 Civic. I noticed it was still obd0 as well.