do you mean the useless thing with a shock that bolts to the strut tower ? or the harmonic balancer on the crank ?
harmonic balancer use a r34 gtt one
useless shock thing , skyline ones could be made to fit . which side of the engine bay are they one ? if intake side , its more likely due to battery being on drivers side but in the boot of skylines. can prolly redrill holes around strut tower