When I got my swap done they used my stock DX dizy, they didnt put on the b18b, so my question is, is there any major difference? Would this be robbing me for power in any way?

Other question is, If I upgrade my LS valve train to Crower stage 3 drag cams, (404) with all the prins and retainers aswell, could I increase my redline any? or is it safer to stay at stock redline?