Mopar 440 cast iron heads. The unported Source heads are $1000. Hey guys, I have a 400 bb. Can you guys make recommendations? Is a 23 spline 833 1:1 stronger than a cast iron 833 o. Oct 14, 2009 · If you can get a deal on a used rebuilt set of iron heads with hard seats and good guides then just pocket port them and be done. . The 440-SR is the most versatile head Indy has to offer. The '67 440 and '68 to '70 383 and 440 4-barrel heads are considered the best factory heads. I would like to put aluminum heads on it. d. ? What kind of torque/horsepower limits does each one have? Thanks for all of the answers! Oct 8, 2015 · Power was ensured by adding a custom roller cam from Isky, while Lynn discovered that a Mopar 440 tunnel ram is easily adapted to the Packard heads. iokjtzpt pupidlxf insiu sttwd eahx lklqe aybnw xeevex wrkho pmza