Stop in for a cup of coffee

I had to use a 3/8 inch spacer on my 408. I used my 273 covers and no way they would clear the roller rockers i used. They are a real nice piece, but dang pricey..MediceMfg ...Valve Cover Spacers - Mopar
Thank you. I was searching for what to use. I’m just overly frustrated right now. I’m assuming you still use gaskets with that also?