for starters, a 38mm wastegate wont be big enough to divert large maounts of exhaust, you'll get boost spikes/creep like crazy

the smallest I would go with would be a 44mm or larger.

also, dont put the turbo where the muffler went, too much piping length added.

Look under the left side of your car in front of the rear wheel... notice that nice little box shaped area?
thats the perfect place for the turbo


also, the only difference internally are the pistons, they use the same connecting rods, head bolts, etc. even the same headgaskets.
they just have lower compression pistons.

you are also going to have to use oval aluminium piping for the charge pipe, as theres 0 ground clearance.
burns stainless should have some, i'd order it in one continuous length to run under the car, so you dont have to deal with multiple silicone connectors that could be prone to pop.

I also have an exra tilton scavnege pump sitting here (since you will need one)