from experience there really is no miracle in a can they can just delay the reality.
that the engine is getting tired. and is in need of a rebuild. i find that late model 302s will last to 200k and beyond in passenger cars. but start to lose power at 150k plus especialy beet on ex police. you mentioned putting heads on the motor. it would probaly not bad idea on high mileage
engine, ive found the rings dont stand up to increased compresion. heres something to thing about take the money for the heads and rebuild the engine so you have a good solid foundation to build from. the engine may not
even need bored (thanks to the low tension 1\16" plasma rings ford put in it) and it has trw forged pistons already in it. so you may just need rings oil pump gaskets bearings and some other odds and ends plus you can clean or replace sticky lifters. and end up with good platform. just a suggestion
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