dude,seriously if someone offered you 4500.you should have grabbed the cash thrown him the key and hauled ass.an 88 pickup truck is old as fuck i live in miami ive seen trucks like that stock sell for 1,500 everyday.unfortunately the more you customize it the more people dont want to buy it.but glws.call the dude that offered you 4500 and go buy a clean ass s13 or s14 and youll still have money left over especially if you want an sr.just buy a shell(which can be found on craigslist)and get your engine