If it were me I would sell all the Boss parts including the block and get Dart block and just build a Windsor motor. The money from the boss block and any other Boss parts you have should command a premium from someone building a Boss car.
Yes, you can use Trick Flow 302 heads on your '70 Boss 302 block, as the water ports and basic head bolt patterns are the same as a standard 302. You’ll also be able to sell the Boss-specific components like the wheel hub bearings and heads and reinvest in a stroker kit, which will give you better performance without the difficulty of finding rare Boss-specific parts.
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