Best 273 and 318 builds (NO 360's please)

Thanks so far, guys. I was thinkin a good single plane, like M1 might work better at 6,500 +.? One question is, described crank,rod and piston combo should live at ? rpm. ? Haven't been able to locate,CA. guy ,that specializes in Thermoquads.ateam.:glasses9:
If it gets short blasts of that RPM, yea, I'd be OK with a once in awhile 6500+ RPM finish line run. The issue at hand is actuall total power/torque vs. the stock rod when dealing with the cars weight and intended purpose.

While stock rods are forged and preety good, I really would not push them to hard or to long under alot of power/stress. New rod can be had for very reasonable prices with handling abilites of 750 HP. For under $600, it's a screaming deal.
Unless your can is sizeable and the heads abilty is very good, your really done making power by 6500. The M1 single is fine as is the Edelbrock victor and super Victor for that RPM and higher.
Try Thermoquads.com if your Ca. guy can't be found.

How good (or bad) does this manifold look?

It was a standard (small port) 2bbl manifold that was milled out and had a 4bbl carb flange attached to it. It was never given a decent run as the the only motor is was ever run on had a faulty carb, cam that wasn't dialed in properly, and rings that weren't bedded in properly either.



what do you reckon the max static comp my combo will be able to stand (on pump gas) would be? Our best pump gas is 98,(ron) but a mate was telling me at the pub the other night that US octane ratings on gas are in fact the AKI which is 4-5 points lower the the ron. Is this correct?

I don't know what to say about the manifold, I'd like to hold it before I made a comment. It's truly amazing what wonderful things can be done by backyard guys with old equipment modified. It can also be equal in horror.

Here in the U.S.A. 93 is the best you can get in many states, but not all states. With 93, a 10-1 iron head 11-1 aluminum headed engine is OK.
The differences I forget and I would have to brush up on. I don't remember what your method would convert to.

Though I see it every time I pump gas into the vehicles, I just can't remember what it sez on the side of the pump exactly. I think it says ROn + something something something. I'll find out later when I go out later.