[Plowman]

No argument with the balance tube Whitetop. They will certainly make the transition of the secondaries opening smoother. It should not influence the way they close since they close mechanically.

To clarify the liquid line mod, it is not changine the fuel pressure to the carbs, but restricting the fuel flow through the metering block circuits. If you remove your front fuel bowl and then take the metering block out and look on the back side that faces the carb body you will see the liquid line. It can eaily be identified by the only pair of small circuits (holes) which are side by side. One pair on the right and one on the left. It is towards the bottom of the block.

Restricting the liquid line is a tune I like to do on the popular 1850 600 cfm carbs. I did run a pair of 390's on a X-Rammed 327 with the 327/350hp cam. When we swapped them out for a pair of 600's I modified there was a noticable improvement in drivability on the street and ET at the strip. I'm not trying to say it would improve on every setup. I did have better result with 600's over stock 390's on the cars I tuned.

The old 4295 Holley's that were the compliment to the Z28 crossram were 585cfm each and is a lot closer to 600 than 450 is. I think 'ol Smokey U knew a little more about carbs than I do and I'll take his professional opinion that that is the best setup for a little 302.

Summit and Jeggs sell their popular multible carbs kits with smaller carbs than that- so it certainly can work either way. Some like to use smaller carbs, I like to use bigger ones.

I would encourage Musclcar to try and mod the 1850's he has and see what he thinks.