BB Oil Pump Difference?

[80fbody]

Is there a quick way to confirm whether a big block pump is standard or high volume? Got a couple new ones hanging around but not sure if they are the M63HV I need for my 470 build.

 

[Bodyperson]

High volume has to be taller than non high volume pumps. Only way it can happen in my minds eye. Some are stamped HV.

 

[80fbody]

Unfortunately I don’t have a known stock pump to compare. I was hoping someone had the rotor heights. Neither of these are marked so may be new stock pumps

 

[MomsDuster]

Here is a standard oil pump. Body looks to be less than 1.5”

 

[RustyRatRod]

I would say from that comparison the two in your original post are indeed HV oil pumps.

 

[Fast340cuda]

Here is a HV Melling for reference

 

[Daves69]

Std will be around 1-3/4".
HV kit for a std was 1/4" thick
3" bolts pictures below....

 

[80fbody]

Mine are 1 3/4”. Thanks for the help. Anyone have a write up on prepping/blueprinting these HV pumps prior to use?

 

[famous bob]

Is there a quick way to confirm whether a big block pump is standard or high volume? Got a couple new ones hanging around but not sure if they are the M63HV I need for my 470 build.

View attachment 1716170801

View attachment 1716170802

one with longest rotors...