Never had any issue with Dynotech. Got driveshaft on couple of occasions in a couple of days after giving them measurements they wanted

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam, footbrake street/strip car
Best so far, 10.32 1/4
1.41 best 60 foot
6.56 at 104.17