E-street vs Promaxx vs 440 Source

318willrun said

yes, that's the same link i posted in the first post. These have really got my attention. I have the intake and aluminum water pump housing already.

Click to expand...

That's the head I would run for a 440 like you're building. You need to call them and ask about availability, last they told me was they didn't know an ETA on castings..