First of all, what’s your budget? The plug and play kit Chris @ ZeroEV just released for the Porsche 964 is around £60,000 with one ldu and a 5?kWh battery pack.
Tesla is the way to go if you want big performance. The drive units are sought after and are expensive. Ldu is around $7,500. Tesla batteries are harder to get as well; model Ss are being crashed less it seems and the model 3 batteries are useless for most conversions. ZeroEV and Electric Classic Cars use LG Chem modeles to build their 400V packs. In theorie you could mix n match but managing them will be close to impossible. Leaf modules are cheapish but quite large.
And can you package one or two drive units in your car without hacking the vehicle to bits? Because if not your only be able to register the car in a country like the US where the rules are lax.
Revolt just released a sollution for front Tesla motor, rear wheel drive. Should be enough for 3ish seconds to 62mph. Again, won’t be cheap though…