273 Modification

[krazykuda]

When was the change-over for the intake manifold bolt angle? I see there's an edelbrock intake being used, did the heads get swapped out too, or is there an early ede' available for the early design?

64 & 65 had the smaller diameter bolts and different angle for the bolts...

66 and later are the standard LA engine bolts and angle...

 

[krazykuda]

I recently purchased a 66 Dodge Dart GT with a rebuilt 273. It originally had a 2bbl carb but someone had replaced it with a Edelbrock 4bbl. What changes would i need to convert to the high performance 273 offered for that year?

Source yourself a service manual for the year of the car for starters. You will need to change the pistons and cam for starters if they haven't already been changed.

Here is a link for free service manual downloads:

MyMopar - Mopar Forums & Information - Service Manuals