<VV> Turbo PG's?

[Hugo Miller]

I gather that Spyder engines and Powerglides are not a good mix? I had 
always understood that the torque output from the Turbo engine was 
actually lower than the non-turbo at low revs. But I've just seen some 
graphs which suggest the opposite?
I am on the point of rebuilding a 164 140 to go in my PG, but a good 
Spyder engine has just come on the market, which would save me the job 
of rebuilding the 140.
Any observations?