Dss recomends a 7qt oil pan for the low comp 331. Like stang racer 20 said, I`d call a tech too. They can answer all of your questions. The 331 is rated for 650 hp, but they told me it would handle alot more. Its just their conservative rating. They actually talked me out of an r302 block. Hope this helps
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1969 Mach 1 351C with a c6(for now)
Sold 92 Rag Top GT
Procharged & intercooled DSS 331 LC
Holley Systemax 2 Intake, Edelbrock RPM Heads,E 303 ,blow thru air meter, race bypass, 42 pph injectors,65mm tb,1.7 rr, Mac long tube headers w/off road H pipe, Force 2 catback, TKO,Pro 5.0, K&N, Alum DS,3 core radiator, subframe connectors,3.73`s, Nitto DR`s and a Heavy Foot.
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