1968 Ram Air III GTO convertible
'69 engine L74 YZ 400/366 HP 410 ft lbs torque performance longblock:
400 block bored, honed, decked and align honed
Speedpro® performance camshaft:
214/224 @ .050 or cam of choice
.465 lift
112 lobe center
New Durabond® cam bearings
Reground 3.75” stroke steel crankshaft
Resized rods with ARP® rod bolts
New King® performance bearings
Speedpro® domed forged pistons with Molly® rings
9.3 to 1 compression ratio
New Melling® timing set
New Melling® high volume oil pump
New performance gasket set
Pontiac Heads #48 includes:
2.11/1.77 new performance valves
Bronze guides
3 angle seats
110 lb. Matching springs
New push rods and stamped rockers
TH 400 3 sp automatic His/Hers shift
Flowmasters
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