how hard are you going to run it? using NO2 with that converter? you should be OK with the crank as long you are reasonable with it.

the left front motor mount will be destroyed immediately, buy an interlocking poly mount for that spot, the others are OK unless you're planning some hard launches in reverse.

 

What is the operating range of that cam? From the specs it looks like you will be under 6000 mostly. . I have heard of a lot of examples of BBC cast cranks taking a lot of abuse..so save the money for a 496 etc forged roatating assembly..

 

I agree with Tom, how hard you gonna run it Mike? The rest of the pieces are above mild in my mind and you are going to set the crank as the weakest link. Cast cranks will take more than they're given credit for but if it were mine I'd search out a deal on a good forged one but I perfer to error on the side of caution. It's one of those pay me now or pay me later deals to me....JMO...Dave

 

No nitrous guys, operating range 2500-6800. I do drive my cars hard on ocassion, I dont beat it, but it will get to the strip two or three times a year with drag radials on it. I guess when a person says "how hard are you going to run it", hard but not abused would be my response. Redline once or twice a day when I drive it, and I do put 5000-7000 miles per summer. I am planning on keeping this motor for years to come and really want it to last. Will I be ok with the stock crank?

 

Many folks over the years have abused the snot out of chevy cast cranks without issue.

 

Big Block Chevy 2 Bolt blocks, cast cranks with 3/8's truck rods. If you have a good machinest and careful preperation they will work fine.
There are a lot of super stockers out there running with this set-up.
Much easier on the budget IMO.

 

I run a cast crank with a 2 bolt main in a 439 that sees over 6K at least once a month on the strip with no issues. I do have studded mains and the rotating assembly is balanced.

 

I'd surely run a solid or interlocking poly mount on the driver's side, without question...

 

Run it! I giggle when I see other threads where guys suggest high dollar stuff for this or similar combos. I have a BBC 2 Bolt block (studded) cast crank with 3/8's truck rods. Dyno'd 549 in 1998 with 049's and have Darts on it now Hit it with NOS 6600 shifts, 7000 when I'm late. 4100 pounds, 3500 stall, let it EAT with no worries.

 

Turns out my crank is a scat steel crank, should be no worries!