LS 4 Bolt 102mm to LS1 96mm 3 Bolt Throttle Body Adapter and designed with a 10

and designed with a 10 degree taper

They're available in round and oval styles

Note: The 52000/52001 manifold is a stock replacement/street legal part for 302

Just bolt the pre-assembled unit to the back of the shifter and you are ready to go

If you are using the magnetic pickup input (green and violet wires) to trigger your Speedmaster Ignition

LS 4 Bolt 102mm to LS1 96mm 3 Bolt Throttle Body Adapter and designed with a 10These adapter plates are offered for several different applications, but they are all made from aerospace grade aluminum. Adapter plates are available in a variety of straight and tapered through hole diameters.