Just pulled my engine apart, carbon hell. The combustion chambers are black. The pistons are caked. The one thing i'm wondering about is the pistons. They have double reliefs. What I mean by double relief is the pistons have two reliefs for the intake and exhaust. I'm used to the old, (60's- 70) pistons that have a single relief, flat top, or domed. What is with the double relief? It's an early 75 engine,(late 74) 230 hp, 98cc heads, 2.11/1.66 valves. How big of a cam can I safely go with. It has a 4sp and headers already. Also what aluminum intake will fit with the shaker hood.
75 T/A
thanks
mike

Just pulled my engine apart, carbon hell. The combustion chambers are black. The pistons are caked. The one thing i'm wondering about is the pistons. They have double reliefs. What I mean by double relief is the pistons have two reliefs for the intake and exhaust. I'm used to the old, (60's- 70) pistons that have a single relief, flat top, or domed. What is with the double relief? It's an early 75 engine,(late 74) 230 hp, 98cc heads, 2.11/1.66 valves. How big of a cam can I safely go with. It has a 4sp and headers already. Also what aluminum intake will fit with the shaker hood.
75 T/A
thanks
mike