Black soot feom exhaust pipes

[2square]

Hello I have a question about my newish 350 vortex engine. I have a brand new holly 750cfm carb, it seems to run amazing but I'm getting black soot on the garage floor on start up? Is it too rich? Anything helps. I posted a picture. It's equal on both sides.

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[Ricko1966]

Probably not a big deal everytime it starts,it's rich because the choke is on.

 

[DoubleDingo]

Normal. Condensate being blown out the pipe. Means your exhaust is tight.

 

[Rusty Nail]

Yeap. I vote new motor bustin old crap out the pipes.
Reckon it'll stop??

 

[Buck69]

My parents had the same issue on their garage floor when I was a little snot. It wasn't soot though....

 

[2square]

My parents had the same issue on their garage floor when I was a little snot. It wasn't soot though....

Haha I have a bit of rubber on my floor too! Thanks guys I'm just paranoid it's my first time building an engine and I learned from Google and this forum so appreciate the responses