Why plane your intakes w/ milled heads???

Things that cause poor intake matching:
heads milled a lot,more than .025
thin heads gaskets
Deck milled to square it and has a lot removed,more than .010
More than 1 line honing
intake that has been used a on a machined motor that has more than .020 off of each side.if a intake that has been milled a lot,can still be used with perfect results,you must use .030-.060 paper intake gaskets and with he original sheet metal intake gasket for big blocks.Will seal and match up perfect
If a owner wishes to replace or try different intakes or does a lot of internal work,(racer) its best to mill the heads,as you can then interchange intakes in minutes,same goes for the street performance owner.if the owner does not intend to ever change the intake,then by all means cut the intake the minimum amount.You only have the two options,and the the reason listed will determine the way to go.milling the heads will not cause bolts to fly out or snap out threads,unless you mill the intake surface .200,only small amounts of the head intake surface is needed,.020-.030 on a angle cut at that,and its .030 cut at one end to zero on the other,so get that worry out of your head.Small block need to have the ends milled to allow the intake to have a gap so silicone or gasket can fit,pre- fitting the intake will determine this.So if you have a milled intake and think its no more good,call me and I will buy them and have them running on good cars and with no problems,and i will make a ton of money off of you.mrmopartech