[whitetop]

Chuck
The 600 vac sec carbs maybe alright for your application because you have 50+ more cubes than mine. I would try them and if they don't tune out right go with the 450's. A friend of mine who built a streetrod with a 350 TR had two 600's like your but later put on my 450's and liked them better. Of course his engine was no where near as radical as yours. I think his had 9 1/2:1 Compression. The 450's are not vac secondary but the motor seemed to like the smaller cfm.

Like Sam said you need to increase your gear ratio in the rear. You may have a bog/hesitation when leaving. I can't over emphasize enough if you want to run one of these on the street you need as much vacuum and torque as you can put into the combination. You will not beleive how much torque you will loose from running a TR. Remember these were designed for the strip with cars leaving at 6-8K rpm. My friend who has the street rod only has something like 3;73(?) also but he is running a 5 speed and had a very low gear placed into it for first.