Gasket matching question

[73 Mike]

I ran into a wall last weekend. Literally! I put the last two pistons in the stroker and while doing a "rotation" check, thunk. One of the cylinder walls were not clearanced. I had to borrow a die grinder from Randy on Sunday morning. 45 seconds with a carbide bit and no more intereference!

Anyways,after a long week, I finally can get back to it. I have a deadline down south to meet.

I got my intake gaskets as recommended by Dart for these heads. Although not perfect, I presume that this match is adequate no? In other words, should I be grinding the corners of the intake runners on the hedd to better match? I don't really know what "good enough" is.



The next question. Should I try to grind down the intake to match better? The difference here is much greater but I'm not sure that there will be much aluminum left when I'm done. This is an Edelbrock RPM intake.



I thought that the reason for the poor match was that the runners on the RPM intake are much smaller than the Victor Junior that seems to suit better, but the cross section on the Victor doesn't look much different



As always, thanks for the input.

 

[73 Mike]

Pictures FINALLY downloaded. If proponents of Prop 8 spent a day in my house, they'd give up the fight.

For bonus points, can anyone identify the brand of these 7/16 aluminum roller rockers? Are they any good?

 

[mrvette]

Those rockers look like the ones I have on my 355 here for some 12 years and 100k miles....working fine...that markings do not look familiar....mine were a cheep set from Summit, as I recall....like 150 bux?? not much over.....
pretty cheep for that point in time....others were 3-400 bux....

NOW keep in mind I can count maybe a dozen times my engine has EVER been to 5 grand.....nothing higher.....

As for the gasket match shown above that, it is damn close to what I had on my L98 #113 stock GM Aluminum heads when putting the Edel TPI base on it some years ago....the present LT1 modified induction is very similar...and I didn't bother to grind anything as once again, I noticed the offsets were pretty close, and I wasn't after every HP at 5000+ rpm, I left them alone....

:flash:

 

[BBShark]

It looks like your intake ports are smaller than the head ports so you should be fine. I had the opposite problem and just spent the entire day port matching my intake and heads.

 

[73 Mike]

It looks like your intake ports are smaller than the head ports so you should be fine. I had the opposite problem and just spent the entire day port matching my intake and heads.

No question. The intake ports are smaller. I assumed this was better than the other way around, but didn't know for sure if it was still a problem that needed to be dealt with.

Thanks for the input guys. :beer:

 

[kwplot34]

How would you go about checking for the intake runners mating up with the head ???

 

[73 Mike]

How would you go about checking for the intake runners mating up with the head ???

You simply use the gasket as a guide. You just need to be very careful using the bolt holes as a guide.

The way I was shown, you put the gasked on with a coupke of bolts to hold it in place. You use a marker to show where material needs to be removed. You remove the gasket and grind away.

 

[BBShark]

How would you go about checking for the intake runners mating up with the head ???

With mine it was easy. Reach down the port with a Sharpie (BB RamJet intake), and mark a line on the head.