I am not sure on how big the difference is because when I bought my truck the motor was stuck. I just replaced the old ignition and points and replaced it with the mini HEI. If you do not want to make one as in the tech tip, here is where I got mine.

Mini HEI

This unit is based on G.M. 2.8L “S” truck 1982-1984 and uses cap, coil, rotor, module, pick-up coil, and vacuum can from this distributor. The optional round coil is typical Ford electronic ignition 1977 to 1984

Last edited by Tiny_Jaime; 12/28/2013 5:24 AM.
"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my sweet ride." -Amen

56 Chevy 3100