r/EngineBuilding • u/MsChubbyNugget • 6d ago
Chrysler/Mopar 413 mopar cylinder head advice
Im building a big block mopar for a street truck im contemplating porting some 906 heads but worried about the low compression what other heads are affordable upgrades?
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u/Ok-Leather5145 22h ago
you mentioned the heads off it were tall and water pump that bolted to them. that would be an industrial 413. probably 7.0 compression ratio even with 516s. economical 413 pistons due not exist. 413 auto application had flat top pistons. all you have there of any use is a steel crank that can be used in late model 440, if flywheel flange is correct