DDP vs. SDX
 

Ive read thread and thread on these Two brands of injectors and I'm stuck! :argh: Not knowing too much about injectors/turbos and their relationship is killing me. I've got a mostly stock 89 Non intercooled 12 valve.
Gauges, BHAF, VE pump work, full fuel screw, star wheel, smoke screw M5 Fuel pin. Stock H1C non waste gated. 4" DP to exhaust. From what i know stock 727 with a deep pan.
Ive had my fun and I'm just ready to move up! i need more power. Tows great but shes a little on the slow side. I'm looking at the DDP Stage 3 injectors OR the SDX 5x.014. Comparable injectors from what Ive read aside from the price.

If i get either of these I know a new turbo is needed. Ive had it in my head for a while, id love to get the he351 but I'm sure there is much better out there. I'm leaning away from compounds so what type of a single would i be looking for? How do i determine what size turbo would perform the best.. Brand, build or buy. modify the H1C, intake, exhaust housing size, ect ect.

Any help would be amazing!! I'm just lookin to learn

I'm planning on a similar purchase.. I'll probably go for some 5x.014's and drop the hx40 for an s363..

DDP4's are the same size as 5x14's stage 3's are 90hp. DDP's are way way over priced. there is going to be no quality difference from either injector. we are no longer going to carry ddps's because of their outrageous price. their products work but they think they are gold. my vote is the SDX or some DAP's many places build a quality injector. and the turbo depends on what you want the truck to do. i very much enjoyed driving with my old 62/65/14 it was a great charger. a he351 is a much more economical charger vrs an s300 and will be a night and day difference over your H1C.