don't do that. buy from a reputable reseller. will Tillery at Roverguy.com is your man to contact. he warranties parts too. usually for a year and lifetime on smaller items like door actuators and such. If you have the ability, I'd go LS swap with the alternative conversions kit if you're looking to buy a turner block or the like. otherwise, turner does make great engines, but last I checked they only had short blocks, so you'd be assembling the heads and up and the front cover and out yourself.

 

Will TIllerey or Doc Heydary on facebook. Get a 4.0 block if you wind up needing one, the earlier the better.

 

For the 5k cost. I would do an LS swap.

 

Diagnose first; repair/replace second.