Most ignition systems HATE solid core wires. MSD and Mallory both are specific to say warrantee void if you use a solid core wire.
For me Taylor wire kits or MSD wire kits are my 'go to' wires for most everything. I did buy one
"Scott Performance" wire kit some 8 years ago and am still using them with the MSD Digital 7 (7530T box) I got a smoking deal on a hand built custom wire kit installed from a guy that was wanting to start an outlet doing nothing but ignitions. Beautiful work, EXCEPTIONAL QUALITY wires and accessories (seperators, looms fireboots etc) ,, but $ was more than most would consider 'reasonable' .