Jet sizes for 410 stroker

[64physhy]

I'm building a 410 stroker. What size jets should I start with in a Pro-Form 750 Mech Sec's with the combo below? Here's what it has or will have:
360, .040 over
4" Eagle cast crank
KB forged dish pistons (KB 745)
Comp Cam 239 int./246 [email protected], .484/.484 lift, but I'm using magnum heads, so that lift is about .516
Airgap intake

I'm looking at 750 pro form with 84/78 jets, mech secondaries. Seems a bit big to me. What size jets will I need to change to for my combo.

 

[70aarcuda]

start with stock jets....bigger engine does not mean bigger jets...

84 in primaries?
78 in secondaries?

 

[64physhy]

They are the jets in a carb I'm thinking of buying. It's a good price, so I'm willing to change the jets, just want to know what size I'll need. I was told the jets in it are 84/78, but 78/84 would make more sense, unless big-blocks run bigger primaries than secondaries (carb is off a 440). Seems like around 74 primaries and 78 secondaries would be a good starting point, but I don't know, that's why I'm asking.

 

[70aarcuda]

if it is a good price on the carb...buy it..the jets and power valves can be changed to fit your needs...

 

[1wild&crazyguy]

My guess for a 750cfm on a 410= 74 primary, 83 secondary w/1 power valve in front to start, unless there's 2 pv's then 74's pri/sec to start.