have you ever looked at using 5.0 heads? im oping they have a smaller chamber. did you ever check if there is intake valve clearance for the large 5.0/5.6 valves in a 92mm bore?


(EDIT) just went through epc and the US 5.0 runs small 46.10mm intake valve seats like everthing (including 3.5/4.5) else but the larger exhaust at 42.1(3.5/4.5 40.10) like a 5.6. a 4.2 runs the same valves in a 92 mm bore so that will work. 5.6 has a 47.5 intake valve seat. 5.0 also runs the same cams as a euro 4.2. high power euro 5.0 has big valves like all 5.6. but all the 4.2 and 5.0 run the same cams. interesting. 4.2 say 232ps 5.0 265ps 5.6 300ps euro.

now i just looked and all 5.6 including ece 300ps engine and 242ps us engines run the same cams! so all the power differences have to be compression ratio. very interesting.

so still need to know if you ever checked clearance on the 5.6 head on a 92 mm bore.

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