Dave Patten

The starter bolts will need to be shortened to be flush with the adapter plate. This shows how much the bolts project thru.

The lower L series bolt has a locating sleeve that usually stays in the block. This will need to be removed and installed in the bellhousing. The sleeve projection will need to be .125†or less to provide proper bolt up of the transmission to the adapter. The sleeve will most likely need to be shortened.

This shows the amount needing to be cut off the SR locating dowels. The end of the dowel needs to be flush or recessed below the surface to allow the transmission to properly bolt onto the adapter.

This shows the counter bored area for the flywheel and the counter sunk holes for the flathead 12mm bolts. This photo was taken indoors without a flash so the color is off, it is actually mill finish aluminum.

The bellhousing will need to be modified for the nose of the SR starter. The bolts that hold the transmission to the adapter plate will also need to be shortened so they are flush with the adapter, otherwise they will bottom against the block before the transmission tightens to the adapter.

The SR starter has threads in the nose housing at the bolt holes and the starter in held to the SR engine by bolts that pass thru the original FWD bellhousing into the starter. To install the starter using the adapter you will need to drill out the threads in the starter and install M10 x 1.5 bolts thru the starter into tapped holes in the adapter just like the L series starter installs. Use 14mm head bolts; otherwise the 17mm hardware store specials will not allow a socket onto the head, which will be needed for the installation. All bolts will need to be shortened to not protrude past the adapter plate. See how the end of transmission bolt from the other side is flush.

This photo was taken inside without a flash and NO these are not gold anodized. Artificial light will often add yellow hues. This part is aluminum mill finish and untreated.

The L series engine uses a dowel pin and a sleeve around one of the lower bolt to locate the transmission. The SR engine uses 2 pins, which will need to be shortened for clearance when installing the adapter and L series transmission. This shows the L sleeve location on the adapter and the shortened SR pin. Use caution when tightening the bolt at the sleeve, the threads are only .250" deep into the aluminum. The L locating pin at the top of the engine is not used as it falls on the edge of one of the SR engine's mounting bolt holes.

The starter is located higher on the SR engine than the L series. The SR starter is used and requires that the L transmission be modified for clearance. Number the bolts and bellhousing location. This will help when you reassemble the pieces because the bellhousing bosses can be different lengths.

M12 x 1.75 grade 10.9 flathead bolts are used to install the adapter plate to the SR engine. These allow the L series transmission to mount flush against the adapter. They are installed with a 8mm Allen wrench.

Here are the pieces all bolted together. This is an automatic bellhousing from a late 70's 510. I use it with another adapter plate to mate it to a sequential shift Quaife 5 speed.