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: Help me identify these heads gared69 Oct 12th, 04, 11:03 PM I was over to a friends house tonight and was looking at some heads he had on a 350 engine. The casting numbers were 378450 and 354484. I looked on Mortec.com but could not find those numbers.Any ideas and if so are they any good? Thanks in advance for your support. Zman Oct 13th, 04, 3:23 AM Maybe double check those numbers... These are the closest I found from Mortec. 354434.....75-79...262/267/305...60cc chambers 376450.....75-81...262/267/305..6 or 7 exhaust bolt holes, 60cc chamber gared69 Oct 13th, 04, 10:51 AM Thanks, are these heads any good? Zman Oct 14th, 04, 6:05 AM Well, the small 60cc chambers will yeild a higher compression ratio, but I think they have pretty small valves, and I have no idea how well they flow... Maybe someone else will chime in with more info. Stalkingbear Oct 15th, 04, 12:56 AM Serious smog heads... ick! Probably have 1.84 intakes and 1.5 exhaust valves... great for 305's... will choke a good 350. IMHO | ||