Quote:
Originally Posted by 283nova
66 283 220horse
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1966 283/220 HP has a "rated" comp ratio of 9.25. Uses a Roch carb # 4GC-7025127 for a stick and 4 GC-7025126 for a P/G.
1.5 rockers Hyd. cam
54.9 CC's for the head and .002 deck
Flat top pistons w/ 4 valve relief's
Intake valve 1.725
Exhaust 1.505
Cam: zero checking clearence, 300 degress duration on I and Ex. with 78 degrees overlap.
.399 lift.
single spring w/damper
86 lbs closed spring pressure
180 open spring pressure
.018 head gasket