[YoungPup1977]

On a stock 350 engine which may see some towing time, I would make sure you have extra cooling other than the cooler in the radiator. There are several nice trans coolers on the market, take your pick.

Grab a Master rebuild kit with steels produced by transtar, transgo SK350 shift kit, upgrade your intermediate sprag, bushing kit, thrust washer kit, adjustable modulator, band, filter and a stock TC.

Bushing kit (buy the one that has the wider direct clutch drum bushing), weak point on a factory T350.

Governor springs from SK, use YELLOW/YELLOW.

Direct drum pressure plate is thicker than the Forward clutch pressure plate.... they are used for clearance purposes. Always check your clutch clearances.

If you like nice firm shifts "ONLY", you can do a few of the following suggestions which does not cost much:
1. Take the waved plate out of the "intermediate clutch pack" and replace it with a steel these steels fit into the case of the trans, which is used for second gear, clutches spline into the intermediate sprag assembly.
2. remove and discard the accumulator spring.
3. remove the spring under the piston in the VB that applies the band.

Thats enough free advice for now.....GOOD LUCK !