Correct i have a 96Z34 monte and it had the larger radiator. direct swap.
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96 Z34 (3.4L DOHC RIP PB 14.81@92.2):
www.cardomain.com/id/z34phoenixL36 swap SD header, 2.5" exhaust, HV3, PowrTuner, Wideband, topswap w/ ported heads to be installed