This is the street motor I built for the Demon. Like a couple of others here, the 318 is an interim engine until it either blows up or the budget makes a Gen III hemi feasible.
Here's the specs:
Block, rotating and reciprocating parts come from a 1968 Dodge Coronet. Front cover and cylinder heads are from a 1988 Dodge truck, damper and pulleys are from a 75 Plymouth.
Cast pistons replaced with hyperutetic of identical measurements ('68 spec, flat top, 4 valve reliefs).
Cylinder heads have been replaced with casting # 4323302. This head features a closed combustion chamber with 62.6 cc volume Valve Diameter: 1.78 inch (intake) 1.50 inch (exhaust) Heads have hardened valve seats.
Engine Intake: Manifold: Edelbrock Performer #2176 Carburetor: Carter AFB rated @ 625 cfm. Manual choke. Air Cleaner: K&N #1110
Tuning:
Spark plug: N13Y Champion or equivalent Plug gap: .035 inches Timing: 2½º BTDC Point gap: N/A electronic distributor Dwell angle N/A electronic distributor Idle: 750 rpm hot idle