Thank you tom, if I understand you correctly the timing in my current 89 Blazer with the 350 is controlled by the ecu? Do you see any issues with this bolting this blueprint engine up to my current setup which is all stock, transmission wiring etc? Thank you

 

I see no problem with it at all, other than the fact that it's pretty expensive. I haven't bought an engine in a while, but it seems like the Goodwrench engines are (or at least used to be) a lot cheaper, and come with a great warranty. But they only put out stock HP, which isn't all that much.