Getting ready to install rebuilt 455 in my 70 Olds 442 W-30. the original tiktoc tach never did work right. Whats a good replacement Tach to protect the engine during break in.
Whats the proper engine oil for break in. (with zink) Whats the first 100 mile procedure

 

There are shops that can fix your old one, google them. Use a good oil with zink, or also add a bottle of cam break in addative , then change the oil after break in, and if flat tappet cam, use the oil with zink . I use Brad Penn in mt car.

 

whats a decent after market that wont