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66fastback · 05-25-1999, 01:47 AM

True about the valves, but after 70, the combustion chambers were enlarged to 64 cc. Too big, in my opinion, for a 289. Hence the only really good 351 heads for this swap are still the 69 and 70 models.

05-25-1999, 01:47 AM	#4
66fastback Registered Member Join Date: Mar 1999 Location: Dallas, TX Posts: 208	True about the valves, but after 70, the combustion chambers were enlarged to 64 cc. Too big, in my opinion, for a 289. Hence the only really good 351 heads for this swap are still the 69 and 70 models.