For manifolds, bolt pattern is same, they will bolt on.
But port size and shape is quite different, dunno if there is even enough alloy to be grinded in silvertops manifold.
Heres a pic, abowe is ST and below BT
http://www.koti.phnet.fi/crash/Flame/QTB/PICT2206_1.jpg
You would have to use BT intake gasket or make your own.
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