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OregonMalibu Sep 14th, 04, 7:54 PM I'm going to be doing a build up on a 350 and I have a couple of blocks available to me. Both are 4 bolt. Could you guys tell me which one is the most desirable for a 400-500hp build. The #'s on the first one are 3970010 H25 V0825TFM : the second one is 14010207 H44 V0528FLO any info on these would be great. Thanks ZZ69chevelle Sep 14th, 04, 8:29 PM Look on the front of the block under the timing cover for the nickel and tin content. there will be a five a ten or both. Unless one is a one piece rear main seal, that's what I would use to decide. CNC BLOCKS N/E Sep 14th, 04, 10:53 PM If one of the blocks has 2482 on the center caps that would be a high nickel block as well. Those caps are much better then the standard 3412 center caps. BruteSBC Sep 18th, 04, 11:03 PM 0010 block has high Nickle content, great for a racing application, good strong block. Pat Kelley Sep 18th, 04, 11:59 PM The 0010 is part of the casting number (a standard 350 block) and not the nickle content. Look under the timing cover for a 010 (not 0010) for high nickle. | ||