74 XB Fairmont
Join Date: Sep 2001
Location: Cranbourne, Vic
Re: A few pics of the 393 going together.
There's 15thou off the block and 40thou off the heads 55thou total. You'd expect a pushrod that was 50thou shorter to be close but it's not.
The adjustable pushrods useless. It has no numbers on it so you don't know how long it is. I know each 360 turn is 50thou though. I'm not confident it won't fail under normal valvespring pressure. I fitted the outer spring to the no1 cyl last night as the test springs are a good idea but without any way of measuring the length accurately, it's pointless. The adjustable pushrods adjustment also moves while your pulling it past the cylinder head. Which is handy. Tools are supposed to make a job easier. All they've done is make it harder than it really is and a hell of a lot more time consuming.
So far the best one is 8.492" long. I've tried three length pushrods so far. The other two are shorter than this one. I used a lifter from the old engine to test. Then swapped to a new lifter and found it made no difference. Looks like I may need a 8.5" pushrod.
XB Fairmont (street car) email@example.com.