No take off power put it in reverse dies

Back again, I am still having no power on the Corvette engine. It has the fuel pump that the 1994 had. I changed fuel filter filthy black. I have not checked the pressure yet, but when I got the truck back a month ago I did not make it home and the engine blew, so I put the Corvette engine in, but I failed to mention that the no power problem it was doing it to on the other motor-home power. So what does it sound like? (It does not have converter on exhaust) so what is can it be service light is on.