Doing an engine rebuild and going with 0.80" spacer, can I use stock cam timing and stock sprockets? Using stock pistons and rods, hd valve springs, hd studs and retainers, maybe upgrading to carrillo rods if i can find a good price. Will be aiming for around 300hp. Do i need adjustable sprockets? Ive read on here people using adjustable sprockets when using a spacer. Is it that critical? And thanks for the advice ahead time