Topic: 750 Cylinder heads

[75750SS]

Anybody know if any of the K series 750 heads would fit and or work well with a 75 750F?

[MRieck]

All the K's will work. The late K heads(77/78) have better chambers.

[Jerry Rxman Griffin aka MuthaF'er]

Ditto what Mike said. The 77 & 78 head is a -392 also, meaning OUR 75F's are the original/first -392 hemi head. IE same head. My 78K head has  -392 cast into the top fin intake side between #2 & #3 as does my 75F head PLUS K8 hand stamped next to that. Apparently the K8 stamp is due to a few slight variations in keepers and stronger springs as determined by parts number comparisons with the F2/F3 head. SO, if you have the opportunity to get a K head, use a K7 or preferrably a K8 head for less chance of valve float/broken valve at higher rpms when you miss 2nd gear. Otherwise any K head will do but at a loss of performance.

[eurban]

K8 heads use different valves and keepers.  These parts seem to work fine although they are difficult to find replacements for if you need them.  The earlier style valves and keepers will work although I would imagine that you would want to replace a bad valve as a set rather than just one piece at a time.  K7 and K8s (as well as the similar F1 and F2) engines made good stock horsepower with a slight increase in compression (9.2-1) The heads certainly contributed to the good performance.

[dusterdude]

Ditto what Mike said. The 77 & 78 head is a -392 also, meaning OUR 75F's are the original/first -392 hemi head. IE same head. My 78K head has  -392 cast into the top fin intake side between #2 & #3 as does my 75F head PLUS K8 hand stamped next to that. Apparently the K8 stamp is due to a few slight variations in keepers and stronger springs as determined by parts number comparisons with the F2/F3 head. SO, if you have the opportunity to get a K head, use a K7 or preferrably a K8 head for less chance of valve float/broken valve at higher rpms when you miss 2nd gear. Otherwise any K head will do but at a loss of performance.

the original 392 hemi was developed by chrysler in the late 50`s.