whats the best b20 engine? will an obd1 ls intake manifold bolt on? how many psi could i run safely because i know the sleeves are pretty shity in b20s? what mounts for a 92 civic would i use?

 

Obd1 ls manifold will bolt right up
Try to get integra mounts( stock or aftermarket) I went with aftermarket.
Dont worry about psi. Its the horsepower that you should be worried about. Some people have good luck and some dont, its all in the tune for the most part.
The best B20 I would think would be the B20Z cause of the horsepower and higher compression, it will spool the turbo alil quicker.