575 2143 ?
the heads pictured below are bottom 575 2143 1958-59 Edsel-Ford the head in the photo above is D2TEA A . the width on the intake is the same but the heighth is a half an inch taller (untouched) on the 575 2143 . correction 1 7/8ths D2 TEA A and 2 1/4 on the 575 2143 head. that still is a 3/8ths of an inch difference. I was told they (the 575 2143 heads) were nothing out of the ordinary? I plan to port and polish at home (following instructions from U-TUBE). What would need to be done to prepare these heads for larger valves 202.9 to 209.? and also the larger exhaust 166. . when I explain to the machine shop I would like to have these heads resurfaced and....????do I need new seats or the existing ones cut bigger or ? thank you for any comment or suggestion ! ---------