.
. . Bottom
appears flat, maybe .002" warp if that. Average
thickness at front of head is 4.460" Average
thickness of rear of head is 4.436" Has
four bent exhaust valves from chain jumping, so plan on
replacing those. Cam
is good for core; rockers are old style. Subtract $160 if
you do not need cam, rockers, valves and
springs DATSUN
U20 USED HEADS
Info .
Datsun
SRL311 Cylinder Head from Rallye Enterprises,
Ltd.
Head
has about .070" crown to take out of top middle. Cutter
should be stopped before it reaches the ends of the head;
so the area under the end towers are only skimmed.
For
General Info on U20 Heads click on Rebuilt
Heads
Info.