What springs come on eddy performer RPM heads

My Dad had a 1977 B200 van.
Came with a 318-2bbl.
It was a long wheelbase with one of the raised roofs and large side windows, shag carpeting throughout.

We re-ringed a 360, I touched up the heads, put a Performer and a 600vs Holley on it along with some headers.
Cam was the Comp 268H.
With the stock 3.23’s and original converter........ it had pretty good power(15.60’s in the 1/4), and made a damn good tow vehicle...... pulling a full weight 79 Córdoba car on an open trailer around the hills of Vermont and New England.

We never felt like it was “over cammed”....... plenty of power.

After the van finally got too rusty to make it worth keeping, the motor/trans got pulled and put into a 2wd Ramcharger.

And after the Córdoba finally went back to seeing street duty, a different 360 went in the Ramcharger and that 360 from the van went into the Cordoba....... along with an OD trans.