BRAND NEW Stock Capacity SBC Aluminum Finned Oil Pan that fits 283-350 Chevy Small Blocks 1955-1979 Driver’s Side Dipstick, 2pc Rear Main Seal. With this being an aluminum pan, you will increase cooling capacity as the aluminum dissipates heat much faster than the standard stamped steel pans while also taking advantage of thick aluminum rail which is resistant to leaking and warping. The bolt holes around this pan are raised to distribute pressure along the rail allowing for a better seal. This pan is 7.5" deep. This pan will not clear the stroke of a 383 or 400 without modification. Observing the inside of the pan you will notice an internal diffuser that aids in the dissipation of heat.