Oil plug for 4 bolt block?

[Bill Rose]

I'm trying to figure out what the plug should look like, that fills the large, by the oil filter on a L-78 4 bolt main block. Is this the correct style, or should it be the type that would be tightened with a 1/2" socket extension?

http://www.chevelles.com/showroom/data/500/plug.jpg

http://www.chevelles.com/showroom/data/500/plug2.jpg

[John Brown]

Shouldn't the oil pressure line go into the center of that fitting?? http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif

[Bill Rose]

No. The large hole gets a plug. There are 3 holes. The hole on the left gets a fitting for the oil pres gauge. The hole on the right is clutch linkage, and the center hole gets a plug that looks like the one in the pic above ????

[nrjulin]

Bill,

My 70 L78 has that style plug.

Here is a picture before being rebuilt. As you can see it was not the target of my photo (tried to get VIN) but it is visable.

http://i33.photobucket.com/albums/d82/nrjulin/IMG_1541.jpg

I am sure others will offer thier knowledge as well.

Nils

[3macs1]

Did the 69 4 bolts use the plug with the "W" cast into it like earlier years?? http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif I remember the 66/67 L-72 with the "W" plug.