Von; You are correct that the 216 intake will not mate with the 235 exhaust. You may use the 216 intake but you should have the intake bored out so it will use the 235 rings. The last one I did was a Thickstun and it worked just fine. The cost was about 80.00 to have the intake modified. Headers will work fine. Good Luck.
Cheers!!!
John
