ive just been to look at an ERST engine at my local ford breakers,it looks mint,but i didnt get chance to hear it running,the guy said i can have every thing i need to put it into my 3i for 650quid,it looks asthough its had a shite load of money spent on it.

but wot i want to know,is it worth it?how much should i be looking to spend on a ERST engine?

cheers guys