So we had a dd sbc 350 with a 72" blade. With swapping to a Ls with 79" blade and gear box we have to compensate 12" somewhere. I've never built a boat or adjusted rigging. I know we are going to have to modify our cage but my main questions. The boat set level in the water with old setup. I have about 12" I can scoot all the rigging and front seat forward. There will be room to move the gas tank toward the rear to help compensate some of the weight. Thoughts?