All Small Six Back in the Saddle
- Thread starter cr_bobcat
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- boneheaded_ideas
This relates to all small sixes
On a 300 six the front of the camshaft's front bearing journal is even with the front of the block.
Since your engine uses a thrust plate the front of the camshaft should also be flush with the front of the block
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The cam lobes are definitely offset.
Please measure the first two lifter bore locations.
Install a stock lifter in the first lifter bore and measure from the side of the lifter to the front of the block.
What is that measurement?
Next install the stock lifter in the second lifter bore and measure from the side of the lifter to the front of the engine block.
What is that measurement?
Add 1/2 the lifter diameter to those two measurements to get the lifter bore center locations from the front of the block.
Install a stock lifter in the first lifter bore and measure from the side of the lifter to the front of the block.
What is that measurement?
Next install the stock lifter in the second lifter bore and measure from the side of the lifter to the front of the engine block.
What is that measurement?
Add 1/2 the lifter diameter to those two measurements to get the lifter bore center locations from the front of the block.
Next measure the first cam lobe location from the back side of the cam lobe to the front of the cam journal.
Then subtract 1/2 the width of the cam lobe to get the lobe center location from the front of the cam.
Then measure the second cam lobe location from the back side of the second cam lobe to the front of the cam journal.
Then subtract 1/2 the width of that cam lobe to get the lobe center location from the front of the cam.
What measurements did you get?
The difference between lifter bore centers and the cam lobe centers from the front of the block will be the roller cam lobe offset needed to make roller cams.
The roller cam lobes for the 240/300 roller cams had to be repositioned .095" back from the flat tappet cam lobe locations.
Then subtract 1/2 the width of the cam lobe to get the lobe center location from the front of the cam.
Then measure the second cam lobe location from the back side of the second cam lobe to the front of the cam journal.
Then subtract 1/2 the width of that cam lobe to get the lobe center location from the front of the cam.
What measurements did you get?
The difference between lifter bore centers and the cam lobe centers from the front of the block will be the roller cam lobe offset needed to make roller cams.
The roller cam lobes for the 240/300 roller cams had to be repositioned .095" back from the flat tappet cam lobe locations.
