[Accord Man]

90 amps max current draw is at full power (aka will probably never happen)..

Since you're having it respun, try to get 150-180 amps.. I cant remember how high our's can be spun to.. I'm currently running a respun Legend alt..

A deep cycle battery isnt a very sustainable way of powering a system.. Once you have a higher output alt, simply add a cap to protect the alt. Thats it.