its not as simple as that tho to get 450, head gasket? clutch?
like i said earlier, i'm really not slating your car but your asking top money but you havent mentioned anything about the motor in your advert. if i was looking for a saff for this sort of money i'd want a detailed advert.

few things you may want to add or consider adding to the advert.

ever had an engine rebuild? if so what exactly was done, what block? bored to what?, new pistons? new pump? bearing sizes?what head gasket? built by who? what clutch is it running?