Which SP speedo ?

[Big G]

well good advice!

now I need another 7.5 motor

[RogerM]

Which one were you using, the bank of 5 or the bank of 2??

[Big G]

while I was melting plugs I had the row of 4. Now I have the bank of 2 which came with the speedo

[RogerM]

I use both (row of 4 in 2wd and pack of 2 in 4wd), choice mainly down to what fits but I'll watch out for that one.

Was it a capacitor that failed or something else?

[Big G]

no idea. I just know it hasn't happened since touch wood!