Sounds similiar to what I'm hoping to do on my '81 Iraqi Malibu, although the Malibu I have is an original Canadian car, without any computer controls on it at all. I'm going to swap the 229 for a 4.3, using the GM factory 4 barrel intake from the '85-'86 light duty trucks, and the tubular exhaust manifolds. Have to keep the EGR on the car to pass any visual emission inspections here. I'm also looking forward to the looks on peoples faces as well.