74 Dart drive shaft help

Hi all
I am building a 74 dodge dart into a bit of a drag car.
Has a 500ci stroker motor on methanol, powerglide and a 9 inch. Car is mini tubbed with the leafspring inboreded and 35 splines axles and 325 tyres.

I am looking at getting a tailshaft made, will the car require a one or two piece tail shaft?

Drive shaft measurements are
Drive shaft:
L 151.5cm (from pinon bolt face to seal)
Carrier 91.8mm
U bolts 42.6mm
27 splines
Engine Is probaly going to make 650-700hp and turn at 7500rpm.

So what do you guys reckon?

Edit: I will add that there are two driveshaft manufacturers in my area, one will only build a two piece saying it a to risky to run a single piece.
The other said single piece will be fine.