Ok before I discovered and this site confirmed that my pontiac 350 in my 69 coupe was designed to be a little off center.

Now I have another issue that I could use a little help on. I was checking my steering linkage for header clearance and the idler arm knockle near the pitman arm rubs on my header. The headers are Dougs and from what I have read this hasn't been a problem in the past when the pitman arm is curve like mine is. The arm will go past the header when turned hard but is rubs and needs to be addressed. it looks like if the engine was 1/2 inch further back that the linkage would clear

What I would like to get is a dimension to confirm that my engine is sitting correctly front to back. The motor is a 1970, I have new motor mounts (the single bolt from the bottom type, not the long pin stylw) a 200r4 trans and an after market 200r4 crossmember that I bought used.

Can anyone show me how to confirm that my engine is not too far forward.