el arbi

I found a really good deal thats very hard to let go of. Basically the guy was offering me a full greddy turbo kit, brand new with fuel management , and the bigger greddy intercooler all for $2200 installed. Thats an awesome price, but if i buy it I wont have any money for internals. Would it be safe to drive on stock internals daily at 5psi ? And sometimes when i race at weekends at 9 or 10 psi? Will it be safe?