Does any one know where I can buy heat cross over block off plates for my '68 327? I'm using a Performer manifold with the recommended FelPro 1256 gasket. The gasket does have a metal plate where the heat cross over is but the plate has a hole in it ( a little smaller than the size of a dime) I called Fel Pro and they said they don't make one that's entirely blocked off for the Performer. I called Edlebrock and they said use a Mr. Gasket set that has the plates (P/N 101) but I wanted to stick with the Fel Pro brand since I've had good luck with them. Can I just buy the plates somewhere, can I just use stainless and make one - if so - how do I attach it to the heads??

Any suggestions would be appreciated.

Thanks

I just put on felpro's with a full punch out metal blockoff. I don't recall the part #... but if you go to dart.com, and to the spec page for the iron eagle 180 heads, I used what they recommended... Then over to felpro.com to see what's different. The gaskets I got had cork end seals that were self adhesive peel n stick kinda things, kinda like em better than rubber I think.

If you'd posted 2 days ago, i'da sent you the plates... my dart heads ain't got no heat risers...lol

Jim
I just checked the Dart web site - That's the Fel Pro 1204 you used. I actually spoke to the Fel Pro rep on those and he said -although the cross over is blocked - not to use those on Edelebrock Aluminum intakes because they are Steel Core Laminate and not the "Printoseal".

oh well...it was a shot, anyway...

The help is appreciated!

Just got a K-kit, if they're in there, they're yours.

Let you know Thursday.

Thanks Doug!

Let me know...

just fyi, i ran 1205 gaskets (they have no provision for block off plates) on my old SR torquer heads and an egr team G. i just cut a piece of tin large enough to cover the hole in the head, and bent two little tabs on them that fit into the hole, to keep them put. i then smeared a thin layer of high temp rtv on the head around the hole, and placed the homemade plates over that, then smeared more ht rtv over the plates, and about 1/2" around them, and proceeded with normal intake gasket procedures.
i was apprenhensive at first, but they never failed, and were still in perfect shape when i pulled the intake.
just thought i'd throw that out as another possibilty.

Thanks 68
I've heard of other guys doing something similar. Might be the way I'll have to go. You'd think Fel Pro would just make a gasket with a block off! Seems like it's a common issue.

i've run them several ways- crossover totally blocked, a little hole like some gaskets have, and totally open. i've had the best luck with the restrictors on both sides to let some exhast thru. from my experience, a little exhaust gas going under the intake will help quite a bit with cold start drivability and low end response and fuel economy. if you have headers and a good flowing exhaust, not very much of it will go under the intake, anyways, and you will be able to touch the crossover with your hand after driving it for a while.
ok, so you give you a couple of hp on the top end, but since you are running a perfromer and not an RPM or a Victor or something, then all out power isn't your goal, anyways. but, man, that nice stable idle when you start it up cold is worth it- and besides, a heat operated choke (the best kind) needs the crossover warm to work.

Looked at the brown folder in the K-kit... they have holes like you said "about the size of a dime"....Sorry. :(

Nova
I'm a little worried about having "some" exhaust come though the intake because I'm getting it clear powdercoated. I've been told that the powder coat will hold up just fine as long as the exhaust cross over is blocked and not active; that's mainly the reason I want to block it off entirely. Also, I have an electric choke,,,that's not going to be an issue is it??

If the intake doesn't have holes for exhaust gas then how is it going to go through the intake? I have a Performer on my truck and Felpro gaskets and the Performer RPM on my Camaro and I used the same gaskets. I have yet to have any trouble. I think I understand what you are saying but if there is no hole nothing can go there just like the back water jackets getting blocked.

Deerhunter
The Performer does have a passage for the exhaust. You can use a stock manifold mounted choke. I don't think the RPM or Victor series have that provision so it's not an issue with those intakes.

the rpm has the heat passage but no provision for a choke stove.

Electric choke's probably the most reliable, but kinda annoying getting a fast idle on a hot restart or a warm summer day...darn thing just has no idea the motor's warm, ya know?