What is the best way to remove holley choke horn? What do I need to know?

well u can just cut it off with a grinder and clean it all up good with a die grinder, but y are u taking it off. its not going to effect your flow enough on ur 305 to notice, and it sure is nice having a choke on a street car...

Proform or Holley HP mainbody.

Agreed... best way is to replace it with a purpose-built chokeless main body.

That said, I removed the one on my 4777 with a cut-off wheel on a die grinder to 'rough it out' then a grinding bit to clean it up and smooth out the edges. Worked well. You'll really want to blow it out with compressed air, dip it in carb cleaner for a night, and blow it out again after though... there will be lots of metal shavings.

Its a holley 750 dp

Its not for street use, I have never used the choke.

I have never used a choke on a street car either. This is in SC.

Its on a race only 350

I was thinking about using a drimnel tool with cut off wheels and a hand file.

What is the main benefit of this mod?

a lil more air flow ...best way really is how five7kid said, and on a side note im in texas and a choke comes in hady hear....but thats another thread...i see its not for a street carso thats moot....so if u do cut it off just make sure u clean it real well like adam sugested i left it off b4 cause i figured u would know that....

Can removing it hurt performance in any way?

It can make it harder to start cold.. what is your reason for wanting to do this?

no it shouldnt hurt performance any just the start up that u said u werent concerned with anyways

Only reason I did it was for clearance issues... it fit OK with a drop base air cleaner under the hood with a 3" filter, but after checking closer, the top of the choke horn was about 1/8" away from the lid, which I would think would be a HUGE resitiction. I have yet to use the carb though.

I think I found a way around the cold start problem though... at least for the 4150/4160 Holleys anyway. I bought an A/C kicker solenoid and bracket from Holley (used to bump open the throttle to up the idle speed when the A/C is turned on). It can kick the throttle open quite far though, and is totally adjustable, so put that on a switch and use it to keep it idling fast enough to run decently untill its a little warm, then turn it off to let it idle normally.

Would having a chokeless carb effect gas milage any?

You'd probably waste more fuel pumping the accelerator trying to keep a not-warmed engine running than you would with a properly operating choke.

I cut it off with a dremnal tool.

Then went to sanding drums and smooth stones.

I was much easier than I anticipated.

I thought I read somewhere that cutting the choke off will mess up the flow to the air bleeds or something like that. I think they said you have to adjust the air bleeds after cutting it. I don't know... I do know that I've seen lots of people do it before and I just barely heard about the "air bleed" thing.