i think that a 450 engine is a bad idea. Well what i mean is that a modded blaster is quick and with stock suspension you don't half get a beating, so with a 450 engine in it with stock shocks it would be interesting to say the least.
this wouldn't completely cure the harsh ride but would help IMO. 450 engine with a 400ex rear shock and a pair of banshee shocks in the front. sound more like reality? lol