4. Engine

4.1. Bellcrank Ballstud

If mechanical clutch linkage is used, a tapped accessory hole (-13) must exist for one of the bellcrank ballstuds. The hole is slightly above and to the rear of the oil pressure tap that is positioned above the oil filter boss (Figure 4-1). If hydraulic linkage is used, the accessory hole is not needed.

Figure 4-1: Analog Oil Pressure Sender Installed With Two 45 Fittings

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4.2. Oil Pressure Tap

If the car has an oil pressure gauge, the analog pressure sender will interfere with the bellcrank. To resolve this conflict, GM installed a 30 fitting, which is no longer available. However, two 45 fittings will allow the analog pressure sender to be positioned in virtually any orientation and will allow use of the original wiring (Figure 4-1).

When Edelbrock T.E.S. is installed, the analog oil pressure sender can be quite close to the header tubes (Figure 4-2). To remedy this, it is possible to relocate the analog oil pressure sender beneath the distributor (Figure 4-3).

Figure 4-2: Analog Oil Pressure Sender Installed With Edelbrock T.E.S.

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Figure 4-3: Analog Oil Pressure Sender Repositioned Beneath the Distributor

Photographs courtesy of J. Matthew Daugherty

Another alternative is to connect a length of braided hose to the tap in the front of the block behind the water pump. Install the analog sender onto the other end of the braided hose. Route the hose toward the back of the engine and connect the sender to the stock wring harness.

4.3. Bellhousing Flange

There are two accessory bolt holes in the bellhousing flange. If these holes are not being used by accessories, I recommend sealing these holes with -inch bolts to prevent unexpected oil leaks from contaminating the clutch.


Originally Released 11 February 2002

updated 27 August 2007