[PGSigns]

Where they have to go depends on the trans you are using. If you are using the stock bell housing you are a little stuck. An hei will fit in the motor in the rear position its just a little tight. If you are planning to move everything forward and doing a new driveshaft you can move it all up about an inch and drill new holes. Keeps the weight back as much as you can and gives more room for the hei. On mine I just used a small cap electronic distributor. Much more simple way of getting it done.
Jimmy