Convertor adjustment for new combo

it was actually loose with the 360
I had a 4500 flash 727 convertor and trans and went 1.62 and a best of 11.26 with the car.
Took the 727 out, replaced it with a good 904, and bought a convertor. After the swap, car went best ever 11.33, and 60 footed 1.52. Also ran less mph than the 727 did.

so the 904 setup was a tenth faster in 60 foot, but 7 slower in the 1/4 at less mph.
I have actually had 416 eddie head deals before. With these small heads, torque peak is pretty darn low, and peak power probably wont be much( if any) over 6000.
I really think a 5400 convertor would hurt the mph a bunch.
My old eddie combo had a 727 and ran 10.70’s with a 1.44 60 foot with a 4800 flash vert. Those heads were not fully ported either, similar flat tappet this motor has, bit less compression. Was done past 1100 feet.

i do street drive the car too, but how its manners are aren't much of a considerstion...lol
Yea that’s kinda what I meant although re-reading my post it wasn’t clear. I meant I bet you will pick up a little by having it reflashed a little lower with the new engine if it does flash to 5400 or so. I knew you had your car pretty well sorted and foot braked it, but I’m really surprised by the mph drop with the 904. You attribute that to the converter alone?