I'm looking to buy a 87 crx si it is dumping antifreeze in the oil and the guy said it might be head gasket or cracked block. If it is a cracked block I want to know what I would have to do to do a swap for a 1990 civic lx motor and if it is possible.

 

HASport makes the mounts for D-series or B-series into these cars. Check out redpepperracing.com for all the info you will need. Since you are looking at an Si (fuel injected) it'll be easier to swap than a carbed car.

 

Google redpepperracing. That is your 1 stop 84-87 Civic spot.