[Sixpack577]

If I went with 3 can I run stock springs or do I need HD springs

From memory you need springs as well.
I think someone here clarified that recently too.
But, personally, I think it's worth it, as I'de rather have mid to high rpm power, vs power fall off up top.
A spring compressor is cheap too.
Build this thing once, and enjoy it for a long time, even if it takes you a little longer to finish it.

 

[Wilson]

If I went with 3 can I run stock springs or do I need HD springs

A lot of guys complain about losing tons of low end with a stage 3 cam. To combat this, they'll recommend a minimum 11:1 piston. But that can create another problem...the stock connecting rod is a common failure point when you increase compression.. Not good! Given the age of the 660s, you're taking a big risk if you don't replace the con rod.

I know you've put a lot of time and effort into this thing, but playing a bit of devil's advocate, I'd at least consider getting this thing running and sell it, then buy or finance a nice fuel injected 700. You've got to do a lot of modding to a 660 to get it even close to par with a 700. Just something to think about. I loved my 660, but selling and getting a 700 was absolutely worth it.

 

[PrehistoricPredator]

A lot of guys complain about losing tons of low end with a stage 3 cam. To combat this, they'll recommend a minimum 11:1 piston. But that can create another problem...the stock connecting rod is a common failure point when you increase compression.. Not good! Given the age of the 660s, you're taking a big risk if you don't replace the con rod.

I know you've put a lot of time and effort into this thing, but playing a bit of devil's advocate, I'd at least consider getting this thing running and sell it, then buy or finance a nice fuel injected 700. You've got to do a lot of modding to a 660 to get it even close to par with a 700. Just something to think about. I loved my 660, but selling and getting a 700 was absolutely worth it.

Are connecting rods expensive. I like the hunt just as much as the kill! I like the nostalgia of the 01 to much. Plus, this is giving me a huge learning opportunity.

 

[PrehistoricPredator]

Are connecting rods expensive. I like the hunt just as much as the kill! I like the nostalgia of the 01 to much. Plus, this is giving me a huge learning opportunity.

As long as guys are still providing advice through this forum, I’m gonna keep going at it

 

[Sixpack577]

Are connecting rods expensive. I like the hunt just as much as the kill! I like the nostalgia of the 01 to much. Plus, this is giving me a huge learning opportunity.

You'll need a crank and rod assembly, which is around $400-$600(I havn't priced them in a long time).
Otherwise you would need a custom fixture to make sure the crank halves pressed back together in 100% the correct position.

 

[PrehistoricPredator]

You'll need a crank and rod assembly, which is around $400-$600(I havn't priced them in a long time).
Otherwise you would need a custom fixture to make sure the crank halves pressed back together in 100% the correct position.

What’s a good brand?

 

[Montana]

The connecting rod isn’t expensive. Getting it installed on the crank is expensive.

 

[PrehistoricPredator]

it has arrived. OEM cylinder!