Banshee captain thats a deal on those parts. Although i have seen some bad stuff from trinity they have some quality stuff.
I have owned 2 different trintiy 2:1 carb kits,and two trinity stage 4 heads with zero problems.
I have also personaly seen a zilla cylinder that was supposedly stage 4 ported,but they didnt change any port timings,just cleaned everthing up where it looked good. I was standing next to the guy who was measuring the ports to fix them.
The thing is even with stock porting a set of jugs a crank and pistons if its runnable is well worth 300 bucks in my opinion.
2 pistons and bore job alone will almost cost you that much. TRinity porting might not be the best but i seriously doubt its dangerous to run them.