all tu3 heads will swop
tu3j2 had slightly domed pistons
my guess is you could skim head by at least 1.5mm and have no problems to lift compression depending on what cam you fit --any std cam will be fine
if fitting lumpy cam then do a dry build with old head gasket and modelling clay on one piston -time up cam -turn over 3 times -lift head and you need at least 2mm piston valve clearance-or make small "eye brow cut outs" in piston
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Last edited by axsaxoman; 12th August 2021 at 10:05.
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