Thanks guys for the great advice. I was also checking on the Internet for some possible problems. I found that if the turkey tray is not installed under the intake, hot oil can splash up onto the bottom of the intake making the intake get hot. I have no idea if theres a turkey tray underneath but that would give me an excuse to pull the intake and see what kind of work they had done on the heads. The woman that I bought the motor from said that she had $1000 into the rebuild, although she was unable to find any receipts.