I will try to get more progress pics now that I have the hamb app for my phone. ahh modern technology. I am still learning. I made a torque arm rear mounting with a '40 rearend pivoting on a johnny joint. I will get some pics up. this is ch***is and set up for the model a coupe in my albums. it was a runner when taken apart. running a model b and a t5.
I was less interested in equal length tubes so I didn't measure. my main concern was a even look when in the ch***is. I set each tube at exactly the same angle coming out of the block. I figured the merge collector would help the scavenging so the motors torque curve would stay flatter with unequal length tubes. I used 1 1/2 primaries and 2 inch main.