[mrmark1957]

I'm in the process of swapping a pair of #13 heads in place of the 6X-8 heads on my 400 inch motor in my '73 LeMans. The '73 P/S and Alt brackets don't line up with the bolt holes in the #13 heads. Also the 13's are missing a boss with a threaded hole on top. What should I use to make this work ?

[400 Lemans]

On the top where there isnt a threaded hole, just turn your long bolt around and run it through backwards and add a nut to the radiator side. It will hold fine and all the other holes should line up to your brackets. Did this on mine several years ago and everything holds tight.

[Formulabruce]

Originally Posted by mrmark1957

I'm in the process of swapping a pair of #13 heads in place of the 6X-8 heads on my 400 inch motor in my '73 LeMans. The '73 P/S and Alt brackets don't line up with the bolt holes in the #13 heads. Also the 13's are missing a boss with a threaded hole on top. What should I use to make this work ?

You need a 1970 bracket and PS pump set up to run any 11, 12, 13, 15, 64 etc heads.
This will be a tough find.

[Formulabruce]

Originally Posted by 400 Lemans

On the top where there isnt a threaded hole, just turn your long bolt around and run it through backwards and add a nut to the radiator side. It will hold fine and all the other holes should line up to your brackets. Did this on mine several years ago and everything holds tight.

The Bottom of the head is missing a important hole for the pivot bracket. Lets see your pics! Thanks

[400 Lemans]

https://forums.maxperformanceinc.com...ator+hole+head Here is a good thread on it.