Search results for query: 675 heads

...better, because they are closed chamber heads. I think they'd be great from what I read! Here's the deal, though: I just picked up these 675 heads from a FABO member last Sunday (in exchange for a bottle of Jack Daniels). They were rebuilt 5,000 miles ago with new stock valves and springs...

I know that some people talk about terrible the stock casting is on these old heads. While porting my 675 heads I have seen how bad the stock ports really are and well... they bad and they ugly. Some ports were casted off center and the casting slag was horrendous.

And we fuss over NOx levels with this elevated temp blend? Lame......

Here open chamber 318 675 heads doubt 273 is much different. It peaks a 184 cfm @ .350 lift, but within 11 cfm difference between .300-.800 lift.

If your existing heads are working fine, leave them alone and drive it. If they need changing, I'd just install the 675's and go. I'd wait until I wanted to do a complete build to change to the 920's It may be that installing them will boost the compression ratio up to where you have to run high...

You'll have to decide whether you want to go with the '64-5 (315 casting) heads, the '66-7 (920 casting) heads, or later 675 casting heads. That will let us know which intake to look for. For looks, you want the '65 valve covers? C.A.P or non-C.A.P. air cleaner? Numbers matching dual point...

agree. if you do need to swap the heads at some point I'd look at upgrading the cam if it's a stock 318 cam.

I have several sets of both the 675 and 920 heads and almost every head Mopar produced. $150 a pr. for one pr. $125 a pr. for two pr. $100 a pr. for three pr. Most Hot Tanked or Acid Washed and pressure checked/magged. Really nice heads that have been sitting in my engine builders shop since...

920 heads are great. But, I would have them tanked and magnefluxed first. If good, milled .020, mill the intake side .019, probably need to replace the exhaust valves (stainless steel), clean up the bowls, get a competition valve job, brass freeze plugs, and redo the guides, might as well add...

bro, those 920's look tore up from the floor up. if you wanna keep it on a beer budget, snap on those 675's and ship it. there's no telling what could be wrong with those 920's-- janky guides, wasted seats, bad deck, cracked, and on and on. i wouldn't run those without a hot tank, mag check...

X2 plus it looks like one exhaust valve is burnt.

Looks nicer than the porting I did on my 675 heads lol. That guide tail sure does take a long time to grind and shape. Very nice.

Complete 273 minus intake manifold, exhaust manifolds, distributor, and solid rocker gear. Ran very well, double roller timing set and recent valve job on a set of 675 heads. Just getting ready to swap in a 57 Desoto 341 Hemi.

Ok I’m in the planning phase for my big block combo and I have been doing research on the stage 6 heads I’m going to use. I have read many articles on these heads and have seen many different builds being done. I have seen guys posts about the engines they are running these heads on including...

...just not in an A-body. The first 318/4 was in 1978. The '66-7 273 intake will be a bolt-on for the earlier 920 (66-7 273 and LA318) and 675 heads ('68-72 318). Same intake and exhaust port sizes with no LH exhaust manifold issues. If you're going to use the 920 casting heads, those are closed...

Search results for query: 675 heads

675 are open chamber heads.

...up a 1974 low comp 318 with a quick hone, new plasma moly rings and new bearings. I done some home bowl porting & port matched the 675 heads with larger 1.88 / 1.60 valves. SCR will be around 8.5:1 with Mr Gasket 1121G (0.028") head gaskets. Using a port matched Performer intake, 650cfm AVS2...

Those would be the '66-7 heads if you're looking for the closed chamber with the later intake bolts. 920 is the casting number. the '68-up heads are open chamber and are 675 castings. The 64-5 heads are 315 castings.

Are the heads ported ? If you have have that big of cam in the 280s at .050 I'd guess you will hit 660-700 hp is range at 6300 rpm. Just for a reference I have 264 @ .050 in my 470 and make 675 HP at 5800 rpm

Coming up next on Mission Impossible 318 1 hp per cu. in. engine build. 1.88/1.60 (360) size valves in the 318 open chamber 675 heads. (David Vizard talks about cutting down used lighter LS1 valves) 318, 675 heads 1.88/1.60 mopar valves. ☆☆☆☆☆

I want to put a Summit 50052 cam in a decent 318 la motor I just picked up, it currently has 675 heads are the stock springs ok with that cam? They are tan in color. Its going into a Duster i just picked up as well, I'm not looking for anything radical, just a peppy grocery getter for now. Thanks

Here's @318willrun 12 second duster low cr 360 with speedmaster heads small cam header stock gear and stall so basically same engine as you ask him how it works and if the low cr is or isn't tolerable.

How much roll cage do you have ? 10 point?

Yes. Car weighs 3420 with me and 5 gallons of fuel. That mega block/browell bell/Lenco and Dana 60 are all heavy And yes MW Stg 6 heads with 4150 flange M1 RB set up 528 Cid Wallace calculator shows between 650 and 675 hp. Engine dyno pulls showed 707

Depends who you ask :) it looks about right to me, think about milling a bit of the heads and or deck to bump cr closer to 9:1 ?

Alright guys and gals, probably abit of a dumb question but I can't seem to find any definitive answers online. I'm currently building a 318 with a set of milled 360 596 heads, mostly because it's cheaper for me to get the 360 heads milled down to desired cc than fitting larger valves in my old...

Man I hope it makes that. I was going to have him port them to max wedge size but the money got tight. I might get them done when I go to a bigger cam later if I ever do.

He's doing 360 j 915 1.88 heads now

When I rebuilt my 273 I used the Egge high compression pistons. I measured the ratio and ended up with 9.6/1 even though I milled the stock heads .030. I run 93 octane with no detonation. Timing is picky and the advance doesn't come in too quick. It runs well and will get almost 20 mpg if I...