340-360 heads on a 318 poly?

[Moparaddict]

Just wanna see if you guys can help me out here: I'm trying to see if i can fit a pair of 360 or 340 heads on a 318 poly. the poly is a 1966 318 out of a belvedere II.Still looking for Some heads so if you hear Anything Let me know thanks

 

[lewtot184]

nope.

 

[iraqivet01]

318 poly is an"A" series engine. A regular 318, 340 & 360 are "LA" series blocks. Won't work due to the blocks are toally different.

 

[rumblefish360]

318 poly is an"A" series engine. A regular 318, 340 & 360 are "LA" series blocks. Won't work due to the blocks are toally different.

Totally incorrect. But correct on the fact the heads will not work....well...not without major welding skills at least.
See here; http://www.forbbodiesonly.com/moparforum/showthread.php?t=27953

 

[lewtot184]

i think the bore spacing for the early A and LA are the same. head bolt pattern may be the same (?). i doubt the cooling passages will line up and a poly cam has the intake/exhaust lobes in a different position. tappet angles may be different also.

 

[rumblefish360]

See above link I posted to the other thread the OE thread starter, started.

i think the bore spacing for the early A and LA are the same.

Correct

head bolt pattern may be the same (?).

Correct

i doubt the cooling passages will line up and a poly cam has the intake/exhaust lobes in a different position.

Correct, correct, the valve arrangement is I,E, I, E, I, E, ETC...

tappet angles may be different also.

Incorrect, there the same.