my truck blew up
 

my 79 gmc with 350 suddnly blew up
it is a rebuilt engin and has been runing fine i was driving it down the road and it started getting sluggish lik it was running out of gas then it was fine. i switched tanks and it went boom and i lost every thing no lights or nothing and it would not start again. there was some fire under the hood but it went out. i think it might of been a short or the starter. i need heeeeeelllllppppp please.