400's are they any good?

Just thought I'd throw my 2 cents in.

The 400 has very strong main webbing and the largest bore offered by Chrysler. I have one that will be dropped in my Duster but it's on the back burner right now since I restored my motorcycle, but I'll starting a thread on it in the next month or so.

The plan includes a forged Callies stroker crank, CR will be in the 10.5:1 range. Solid roller cam in the high 250's for duration and lift in the .600 range. Ported eddy victor heads, dual quad intake, biggest tube headers I can find, milodon oil pump and some other stuff TBD. I spoke with my machinist and he feels that 600-650 hp @ 6200-6500 is very doable with this combo at the 6000' altitude of Bandimere Raceway here in Colorado and may well be conservative. He says tens easy on slicks once the chassis and engine are tuned. The work he and his crew have done for me has always been top notch and he's been a machinist before I had drivers license, and I'm going to be 46 here pretty soon.

It will be on the ragged edge of streetability, but it's mostly for the occasional weekend drive and the strip.