Theres actually alot of good info in this thread for those who have never ran or even seen these tires. Like me...but my sherlock holmes powers have deduced that the old tires will not perform like the new tires and new tires do not look like the old tires,you pick which one siuts your own personal flair.
My only concern was mentioned in another post,whats the speed rating on these bad boys?I have seen regular s rated tires on the dyno and its a scary swelling event as the tires grow they deform...not pretty.
I do know one thing about them though is that they are very noisy and easily picked out going down the road from road noise they make and the ones I heard made alot of noise.....not sure how that works out on a roadster ?
From previous posts Faith has made I do not think that street racing and high speed corners happen that much.Spirited driving I think was the reference ,not street racing.
Run em and see how you like them,but just be aware that you have them on there and become aquainted with there handling characteristics.Like Dave said ,find a big parking lot and let the burn out and power slides begin and also check how they handle on hard braking.I would go as far as to do this scenario with the radials and then go get the bias tires and go back to that same parking lot and retest the same day to get your best comparison.............as was stated before they are going to come up short in everything other than looks.
Ask any racer/hotrodder that was around in the 60s and every single one of em will tell ya the same story ,...if we only had tires like this in the 60s we could of cleaned house!!!
Good luck with your purchase and on top of all ,be safe!!!