I have no idea what was done to the engine. It's a 69 351w. I bought it used out A 32 Ford street rod. It has very little low end power. Doesn't idle below 950 without fealing like it wants to pull out of the motor mounts. Top end is pretty powerful. I can still spin the tires going about 60 MPH. All this and I paid $490 for the complete motor. All I did was change the
oil and plugs. I guess there are some deals out there!!!! Almost forgot, first t-5 lasted 760 miles. Jim