This is a GM crate replacement 290hp, flat tappet motor used as a standard replacement. It's a great choice and should run well and give you a lot of trouble free miles.

I suspect you have a vacuum leak - might be the squealing sound. How did you install the intake? The Performer is a good choice but must seal well. I use gaskets on the sides - with Gasgacinch on both sides. With Edelbrock manifolds, you must use RTV high temperature silicone sealer instead of gaskets. Apply a 1/4" thick ribbon of sealant across each end seal surface set the manifold straight down and work quickly to get the bolts in working in a zig-zag pattern across the manifold and torque to 12-15 pounds.

Good Luck,
Glenn