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Never quite thought of it that way 273. You actually can't compress what's not there, great point!

Oldmanmopar, I have a 67 Barracuda with 8-3/4" rear and Kelsey Hayes discs up front. I'll like to go big bolt pattern as well, are the mustang rotors a bolt in with the existing calliper assemblies? Can you please provide some more information?

I'm with Rusty, pistons are sitting proud of the block a fair way. Measure accurately to determine static comp, then do the math to work out dynamic comp using a cast open chamber head. Should be around 9.5 - 10:1 static, with 8:1 dynamic comp, that will work great with the MP 484 cam and pump...

Thanks HemiSSDart, I know the 14x5.5J wheels fit both drum & disk, but what makes the disk brake wheels different to the standard 14x4.5?

Just wondering what's the difference between a standard steel wheel for a drum-brake A Body and one with Kelsey Hayes disc-brakes? I have a 67 Barracuda with Kelsey Hayes brakes up front and looking for a set of OEM steel wheels to go back to the stock standard look with wheel covers and red...

As a side note, I took off the Edelbrock 600 carb I've been running last night and installed a nice Holley 600 DP I had. Runs great, idles better and seems to make a little more power everywhere, judging by the 'feel by the seat of ***' meter. I also have the original Carter AFB 4924s & cast...

Thanks PRH, I'll check tonight.

273, I bought the 67 out of Canada in 2020 and had it shipped to Melbourne, Australia. It was in fantastic condition, the 273 was rebuilt some time back and ran well, except that someone installed a big duration hydraulic stick that sounded great, but was really soft on power off idle and...

PRH, that's really interesting that you have experienced something very similar to my situation. I'll take a photo of the offending cam lobe tonight and post for your reference, but I seem to remember it had a wear pattern across the whole width of the lobe peak, not sure on the flanks or base...

Thanks all for your good feedback, I'll definately check No.5 exhaust lobe with a vernier to compare to the other lobes. Bewy, I do have a set of old, used hydraulic lifters to I will send to Clive Cams to resurface. I might just give them a call and see if they can check / repair the associated...

Hi all, I have a 67 Barracuda with a 273 Commando mill. Before I got the car someone else replaced the original camshaft with a larger duration HFT. This didn't work too well for me, so I replaced it with a Comp XE262H HFT stick around two years ago. I noticed recently that there was a slight...

318willrun, I watched your budget 318 hop-up videos where you got your Duster running 13.90's with $500 worth of parts etc. This was great content, inspiring stuff. With this upgrade you ported a set of small port, small valve 675 heads. I'd like to know what difference there is in doing...

J heads come in around 64cc with a 0.040" cut, they were 72cc before milling.

I bought a totally stock standard 1974 318 recently, that was rebuilt years ago and sat in someone's shed. The cast pistons have 4 valve reliefs and are 0.103" in the hole. I bought a set of cheap Sealed Power 526AP30 pistons which are a true flat top with no valve reliefs and 0.067" in the...

For what it's worth, I had a stock stroke 340 built almost 25 years ago that made 480HP @ 6,3000RPM & 450TQ @ 4,800RPM, this was for a street driven 72 A Body with a 4,800RPM converter and 4.30 gears. Great motor, which would spin up quick and pull hard. 340 block bored 0.030" Standard forged...

I have a 340/416 on the go. It has a SCAT cast crank, Eagle SIR rods and Diamond dished forged pistons. The rotating assembly is neutrally balanced, took a lot of mallory metal to get it done right.

I like Uncle Tony and tune in to most of his stuff when I can. I can see how he would annoy some people though, I get it, but I like his focus on working with what you have, keeping stuff within the era it was originally done and passing on his experience to the next generation. I’m definitely...

Thanks Valman, great advice.

Some great replies to my concerns. For what it's worth I have an M1 single plane, Victor 340 and a Weiand Stealth to try on the 416. Interestingly, The M1 has the carb mounting flange welded up so it's square bore now, also the plenum floor has a raised 'turtle' section welded in plus extended...

A few guys have mentioned this might be a better all-round combo on the street with a dual plane intake manifold instead of the Victor 340, I intend to run. Just had a look in the stash of parts and found a nice port matched Weiand Stealth intake. I know that an Eddy RPM air-gap is probably a...

Just to add a bit of a curveball to the discussion, I have a MP 284 / 484 / 108 hydraulic stick in the stash. Is this something that would work with my combo, or am I wasting my time? I say this because way back in the day I had a '68 340 with cleaned up X heads, 9.5:1 comp, cast iron intake...

I agree 496, I had a RPM air-gap but ended up selling it. I think the Victor 340 will work, however an Eddy RPM air-gap would be the cat's-*** on the street.

Garrett, I don't mind the idea of a flat tappet solid stick, I have no issue with going over valve lash once a year. That Howard's cam though, seems a little too aggressive for what I need.

Thanks for the replies, quality control on flat tappet cams are a real concern, so is the stability of rocker gear at higher RPM. I have a set of good used hydraulic lifters that I intend to get re-faced for use with that Comp XE275HL cam I'm thinking of using. I also have a nice set of 273...

I have a 340 / 416 I'm screwing together, with the following combo: * Speedmaster heads that have had the once over by my machinist - valve job, bowl blend, checked guides, under-cut intake valves (flow peaks, intake 265cfm / exhaust 196cfm) * Diamond dished forged piston (-21.5cc) zero decked...

Okay amigo, looking forward to an update.

Any update on how that Crane cam turned out?

With my 8.5:1 SCR, probably a great idea,

Great, l'd be really interested to hear how it goes.

Okay, thanks rumblefish360, sounds quite positive.