You must be a real old gearhead to have seen the old clutch flite transmissions .
Things are antiques and not many ppl. run em - collectors item man . Ppl. are running brunos , lencos , G force w/ dbl. disc setups and floaters in the real fast cars now.

We need more info like other dude said . He's right too about gasket matching the heads to the intake it can gain you almost as much H/P as the port -n- polish job .

We need to know what this motors primary use is gonna be . RPM range ? hyd , solid , hyd roller , solid roller cam ? lift / duration at .050 too . compression ratio ? , choice of intake manifold - single / dual plane ? Rear gear ratio and tire height ? How heavy the vehicle is ? Is it gonna get sprayed ? steel , aluminum , titanium connecting rods ? Gasoline or alcohol ?

If it's a high rpm motor polishing is to your benefit due to greater air/fuel speed velocity inside the intake plenum and intake runners - air/fuel mix. goes through so fast gasoline / alky stays better atomised and particles don't get the chance to become larger .

On a hot street motor the fine grainy texture -aka- "as cast" is to your benefit because the air/fuel mix. is moving through the intake plenum and intake runners at slower speeds / velocities and the grainy texture helps fuel stay atomised .

350 + .060 is a 360 I think . It's been a while since I played w/ small blocks . Life begins at 500 cid .
Crispi :jointsmile: