Originally Posted by 440Jim
Several good points about using an iron block for a real street car.

Here is one more thing to consider. An iron Hemi block and iron Hemi heads will make the car so front heavy, it will handle worse than it does now.
I do love my '73 Cuda with an iron 440 wedge. But it does handle like crap, IMO. The added weight of Hemi parts ???

Pros and Cons.
The new World (Bill Mitchell Products) aluminum blocks have o-rings around the sleeves.


My 2008 KB block has O rings at the bottom of the sleeves. Coolant sealing never been an issue. I also don't believe bore distortion is a problem.


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03