You need to resize the pictures. Micosoft has a file you can download--sorry no link, I can't even spell Micosoft right, ha ha.
I downloaded mine over a year ago, once you have it you just right click the picture and click resize, it then ask what size and you move the point to small. Click OK and thats it, your resize picture is right by the old one but saids small. Maybe just google it or go the micosoft and search for picture resize.
As for MSD, I ran a 6 box for many years but it had no rev. limiter. Well I thought after my motor was rebuilt it be good to have. The MSD 7al box was like $150 more, so I went ahead and got it. The motor runs better at all speeds. Cold is the biggest improvement, idles rough but good with no choke after 30 seconds running even in 30 dergee weather. Wide open I used to get a little bog if I punch it too fast from a dead stop, now with my MSD 7al and HVC coil, theres no bog at all.
They do not make it new anymore, its now the MSD 7al plus which does have a hotter spark yet but is like over $500, then the coil is $130. You could get a used one off e-bay, prices have gone up but are still under $300 or try a digital 6 box, I was TOLD its better than the 7al but its street legal so IDK. Stay away from the digital 7 boxes, they burn up on the street.
Its your call but since you seem to be after every .1 of a second I would get either a used 7al, a new 7al plus or even a msd 8 box--yeah, msd tech told me when I ask if the 7al box would last all day on the street every day, they said yes with the right coil, in fact even the 8 box would last too but when I seen the price, ha ha, the 7al it was.
Most will say the 6 box is fine, maybe so but theres better. Pro racers even use the msd 10 box and coil, thats too strong for 90% of racers but theres a good reason MSD makes all those boxes, even thou 90% think the 6 box is "good enough"