yea all zc blocks are j-spek engines. they're pretty easy to spot too. if you're farmiliar with all the dohc engines that honda has produced over the years this should be a gimme. here's a list of all zc block applications from the factory.

ZC Honda CRX (JDM) 1990-1993
ZC Honda CRX Si16/1.6i (JDM) 1989-1992
ZC Honda CRX Si (JDM) 1985-1987
ZC Acura Integra (JDM) 1990-1993
ZC Acura Integra (JDM) 1986-1989
ZC Honda Civic Si (JDM) 1986-1987
ZC Honda Civic Si (JDM) 1988-1991

good luck