Good Morning,
Cranks are steel, but cast. At this power level, all a forged crank is going to do is add $1000 to the price. Pistons are forged however. No crank issues on these.
The heads are Aluminum Edelbrock castings, cleaned up and assembled by us. i can't say i recall seeing any heli coils in them, other than perhaps the rocker gear attachment holes, but i'd honestly have to check.
