Converting 1111483 to 1111480?

[iceman]

my 09a z has a 1111483 in it what changes do i have to make to meet the 1111480 if any

[bertfam]

No problem iceman. I split it out for you.

Ed

[JohnZ]

my 09a z has a 1111483 in it what changes do i have to make to meet the 1111480 if any

The only difference between the 480 and the 483 are the centrifugal advance curves and the vacuum advance unit calibration (the specs for both are on page 15 in the "Specifications" section of the 1969 Chassis Service Manual). You'll need to change the weights and springs and replace the vacuum advance unit, and have the curve set up on a Sun distributor machine. The stock 480 curve and vacuum advance were set up for emissions, and can be improved upon quite easily.

[iceman]

thanks john maybe i willtry to run down a 480 need it and a 367 starter to make it original for a engine build of 8-25 and also if u know i have a partial vin with the 9 upside down and a 8 higher than the rest   were thease hand stampped .

[JohnZ]

i have a partial vin with the 9 upside down and a 8 higher than the rest   were thease hand stampped .

Can you post a good close-up photo?