porting templates

[360 dart sport]

has anyone used the porting templates for the #308 swirl port 360 heads yet. did you have any luck ? im working on a set right now im also having a 2.02 intake valve installed , milling .060 off the bottom surface and intake surface .im running 9.50 -1 ,.292/508 MP cam M1 intake 650 dbl pump 3.91 posi.the car runs 13.5 to 13.3 @ 102 MPH. im hoping the head work will get me to 12.5 or better what do ya think? by the way im using stock 360 heads now.

[340king]

I just had a set of 360 HS heads done. I slid a tube into the intake pushrod holes. This allowed porting out to the max the intake gasket mating area. We installed 1.94" pro stock undercut Ferera(I can never remember how to spell it) valves. With mild port work we were able to get 256 cfm on the intake at .600" lift.

Be careful on how thick of a tube you put into the pushrod tube. Too large of a tube causes problems with 3/8" pushrods. I now have to run 5/16" pushrods on the intake side to miss the tubes. Luckily I found a set of new pushrods at the shed that I forgot I bought at a swap meet.

[Diplomat360]

Be careful is what I'd advise!

I used those templates on a set of 915J castings (not the swirl port) and broke through to the water port. This was right on the wall dividing the intake & exhaust valves.

Later on I found on that production heads were wet (meaning cooled by water) whereas the MP stuff is dry port (no water passage in the dividing wall). Cost me a set of 915J heads with all the guides already redone and previous street port job in place.

So...if you're going to do them better get things tight and leave more metal then what the template calls for.

[DodgeMan]

Hey 340King:
I would like to know more about how you pressed the tube into the push rod holes. I've thought of this for years but never had the guts to try. Guess I was just afraid of wasting a head. What kind of tube, and what size did you use. Did you seal it in by any means, or just press fit. Any information would be appreciated.
Bill

[360 dart sport]

thanks for the info. i think thoes templates are only for the swirl port heads.so far they have worked great for me. i'm almost done with the first head. i'd like to hear more about thoes pushrod holes.i had the same idea but wasn't sure if it would work. how big was the I D ? i would guess .437/.500 would work for a .375 pushrod.

[360 dart sport]

thanks for the info. i think thoes templates are only for the swirl port heads.so far they have worked great for me. i'm almost done with the first head. i'd like to hear more about thoes pushrod holes.i had the same idea but wasn't sure if it would work. how big was the I D ? i would guess .437/.500 would work for a .375 pushrod.