Dies if brakes are applied suddenly

So it's done this as long as I've driven it, just wondering what the deal is I haven't found it yet. While driving around no problems at all but say if I am behind someone who stops short or the light turns red an I have to stop suddenly, I have to try an peddle it to keep it from dying not bad just a little peddle to keep it running, on a sudden stop. It's a four speed car so it's not hard to peddle a little, no power brakes. It's a small block 318 with 4 inch stroke,rhs heads,xe284 comp cam, headers 2.5 exh, 3:55 gear,750 holly dp, mp dist chrome box, small b&m supercharger still not pos of size between 162 an 177? And the 4 speed I had mentioned earlier. I've read somewhere if I had extensions on my rear jets this might help? I'm not sure.
I did adjust jets front and back but don't remember if this carb has exstentions. I do have another carb that I do know for sure has exstentions it's a quick fuel, I can pull these to try if this might be it, I just hate to rob from a good carburetor. But if it fixes it the problem I'll have to just get a set to replace them. Any thoughts would be appreciated, Thanks. Ps running 18 initial timing, 1000 rpm idle to keep plugs cleaner as its kinda choppy below that, had plug fouling in the past. Not now nice tan.
Author: admin