420a turbo general question & 420a turbo change question

[got_psi]

I'd like to start off by saying I appreciate any help I can get. This is my 1st "tuner" actually this is the only non Ford push rod v8 powered car I've ever owned, but I got it for literally next to nothing, so please don't laugh at my questions .

My car currently has a Hahn stage 5 turbo kit(super 20g) it also has a bent valve in the head which caused it to stop running. I had a mechanic pull the plug & put a camera in the cylinders, luckily, the bent valve didn't smack the piston(forged J&E .20 over 8:1). I also found out my motor was rebuilt under 1k miles ago as previous owner stated(could still see machine/hone/bore marks from when it was bored .20 over) I purchased a used head but then found a great deal on a freshly machined stage 3 ported head from cimotorsports.com w crower valves 5 angle valve job Ti retainers etc

I am curious if anyone in the metro Detroit area knows of any good shops or any "mobile mechanics" that could do this head swap and a few other mods for me(I have a brand new msd dis 2 programmable w boost control 6112-2 & would like someone rewire the air bags/air ride suspension) I have all the needed parts for the head swap(brand new arp head studs, new fel pro head/upper end gasket set etc) I'd really like to get the car back on the road this spring/summer if possible. Any help would be greatly appreciated.

Now my second part of my question may sound really dumb(again remember I've never owned a turbo car most of my cars had carbs let alone EFI ) my car currently has the complete Hahn stage 5 turbo kit. The turbo isn't bad or anything I just am not a fan of how long it takes to spool. What would my options be, if any, if I wanted to switch the turbo itself? Would I have to buy a whole new kit & piping etc or could I re use any or all of my current setup? It's not possible to switch over to something like a gt35r without essentially getting a whole new "turbo kit" is it? If there is a turbo head unit that would "bolt on" w my kit w none or little mods or buying of new parts what would it be?

Again I appreciate any and all help I can get. If you're a mechanic or know of a shop in the Oakland county Wayne county Macomb counties of metro Detroit MI please let me know.

Pic of my motor & stage 3 cimotorsports head I want swapped on(don't mind the hack wiring which was done by previous owner & removed)

 

[spyderdrifter]

If you want quicker spool, you can go with a smaller turbo. See what options from vendors are out there with the same brand turbo. Getting the same brand may allow you to keep some of the same plumbing. It's not a guarantee, but possible. Other than that, the best route would be to custom build your plumbing. If it were me, the turbo is the only parts I'd buy and then custom do the rest.