TT 5.7 hemi in 75 duster

Well, both. I haven't heard of 25-30lbs of boost on a new Hemi. A 6.1 based TT 426" a friend built is looking at 8lbs of boost in the 800hp range.

I dont know much about the chassis build, but supporting 1000hp+ isnt easy or cheap

well first of all have a chat with stu at inertia motorsports he has a few motors running 25-30psi. The key is in the parts choice I was advised against a 392 stroker in favor of a 370 for a 5.7 block, because the pistons will have more of a skirt to minimize piston rock, and they can be made stronger due to haveing more meterial than a larger motor. Now about the chassis, the car is getting a 12pt cage, mini tubs were completed today, and it will be 4 linked. Exact parts for shocks, springs, t bars ect have yet to be determined. The car is getting built to run mid to low 9's but I plan on dialing it back to 10's as I'm not wanting to deal with liscensing. As this car is just a fun toy to play with and to race at test and tune nights at the track. That's the plan but if it runs good thing might change in the future.