Ross, I would SERIOUSLY re-think the lead weights inside the cowl.

That cowl is made of thin fiberglass, and it's only held on with a few screws. I promise you that the combination of the vibrations of the engine, and the extra weight up front will eat large holes in the cowl where the bolts are - and the cowl will pop loose in no time at all.

Screw the weights to the engine mount, or the firewall, but don't leave them in the cowl.