As you prolly know...........wheel hop is when the leaf spring "loads" and then unloads. Making the tire start bouncing up and down. Doubt 10-15 HP would make it go from one extreme to the other.
Cure (shade tree style) Jack the rear tires up off the ground.
With the tires dangling in the air....attach a couple of spring clamps to the FRONT of the leaf spring(front of the axle FORWARD.) Do this on BOTH sides.
Spring clamps construction..... two pieces of flat bar with a hole drilled in both ends. Run a nut and bolt down between the two pieces of flat bar "clamping" the FRONT portion of the leaf spring.
TIGHTEN DOWN!!
This will make the front of the leaf spring very stiff acting as a traction bar...butt not destroy your nice soft ride (that is mainly from the back of the springs)
Stiffer shocks will help too (or just replace the worn out shocks with new ones)
One optional step would be to ALSO remove the factory installed spring clips from the REAR of the leaf springs. This would let the leaves(behind the axle NOT the front) slide more freely when you accelerate gaining more traction.
EZ way is to just buy the spring clamps from Summit.
This should cure your wheel hop.
A famous carb guy once said.........when asked about tuning carburetors....."most carb issues are ignition problems"!
Give it plenty of initial timing and limit it to 34-38*...all in by 2000RPM or so. (12-16* initial may not be too much.)
Advance it until it starts to ping when going up a hill then.......turn it back about two degrees.
The bigger the cam the more initial timing is a good rule-of-thumb.
THEN......adjust the carb!!
6sal6

Thank you Sally,
I actually didn't know that fix for wheel hop, but

The point of my msg wasnt to correct wheel hop!  It was to figure out How and Why changing from a 600cfm Holley DP to a 650 Edel AVS2 changed from massive wheel hop (Holley) to almost 0 (Edel).

Did I lose a significant amount of power switching Brands?  I was ok losing 10hp, but not 20-30 (just making up numbers to justify the wheel hop variance)
 

I could use  some wheel hop rite now

Last edited by red351 (6/10/2020 5:35 PM)

Want to sell that Holley?

I think it's 3 or 4yrs old. Very Little use, everything flows nicely

Sally take note of msg #7. The last paragraph I describe the engine the best I can. Unfortunately I do not have the build sheet yet, and possibly ever. 

I do have an update which is also a question.
After following your lead on timing, the car does run awesomely, except I noticed PINGING ONLY when the Gear is not matched with the speed/RPM. For example 3rd gear going 20mph and half throttle or greater there is pinging. Is this Normal?  If not, can it be rectified by changing the springs in my MSD? 

When driving in first, no matter what the speed, no pinging, second the same, and so on, only when in a higher gear and lower speed/rpm
 

That's the nature of a Manual transmission. You need to not lug the engine. It is very hard on it.

Sure! Let us know if it 'feels stronger'. IF it ain't pinging....I doubt your hurting it.
(Do you know what your total timing is)?
6s6