h53speed

I am looking to have an engine built in the next couple months or so and was trying to weigh the pros and cons of building a stroker. I don't really want to go with an all bore as I just bought new heads and I don't want to have them reworked already. Plus I really don't trust resleeved engines. I am going to purchase a lightweight k-member and a arms so that should offset the added weight if I go with the iron block.
I am just looking for some input on which would be better. I plan on using a pretty good shot of nitrous with this setup in the 250-300 range. The cam will probably be a custom 236/236 and the car is an automatic. Any inputs would be much appreciated.

Wes

BurnOut

iTrader: (1)

I say go w/ the iron block. The weight difference really isn't all that great (~70-75 pounds, from what I hear; easy enough to offset w/ a tubular K-member, battery relocation, etc...), and the added strength/cubic inches are worth it, IMO.

h53speed

Also would the 4.125 forged crank increase the displacement in the iron block above 396 since it is already a 6.0 litre block?

Black Sunshine/ 00SS

iTrader: (1)

http://www.aera.org/tech/cube_calc.html

Go here to figure it all out. To answer your question, yes, it would increase the displacement. with the stock 6.0 block, with bore at 4.000, you would be looking at a 415, and with .030, you would have a 421.

I would stick with the aluminum block, unless you were really on a budget. The weight difference will help if you are interested in going faster. You can compensate with the K-member, but no doubt the aluminum will be quicker with the K-member also. It will hold up just fine, if you build it right.