[i82much]

i would run the cam you have with the 1.65 rockers, t2 with open or tapered spacer, and a vacuum canister.

i am not an auto trans guy but i would imagine if you err toward a looser converter, you can run a higher idle rpm to get a little more vacuum out of it. an rpm intake might help with low end signal as well.

[Formulajones]

The 242/248 works fine with that compression. My 454 is 10.2 with that cam and made 608/589 with a 305cc intake runner AFR head and makes more torque than a 275 can handle. Rolling 50 mph burnouts weren't a problem. It ran 11.40's at 118 and weighed 4,120 lbs

If you listen to a lot of others they'd tell you those heads were too big for a 454 and won't make torque. That was total bs. It ended up being a nice head cam package and a sweet street engine on what I consider a smallish engine these days and ran on 91 no problem at all.

[Steve C.]

Keep this in mind regarding the solid roller lobes mentioned here, that and the race weight involved. Knowing If you want the valve lift curve to be the same as a hydraulic cam, the solid (Mechanical) lifter cam will be bigger at .050" lift.

If it helps, a friend here in town had a '64 Tempest at about 3500 lb race weight that ran a 10.46 at 127.59 mph. He had a .030-over 455 combo with KRE "310 cfm" Edelbrock heads at the time (72cc castings), Victor intake with a Barry Grant Gold Claw carb (975 cfm) and it had a Comp Xtreme Energy 248/248 at .050 solid roller. Gears were 3.89 with a Huges 10" converter that was about a 3500-plus stall.

Later he changed back to a STREET set up. He put on 87cc Edelbrock heads for use with pump gas, they had a very mild port job by Butler with 299 cfm at .600 lift, and with a nice size 222 cc intake runner volume for the street. Then he put on a Performer RPM intake and removed the larger sleeves for less air flow on his Barry Grant Gold Claw carb. Then he changed to a small Comp Cams Xtreme Energy SOLID street roller with 242/248 at .050 lift . He took the car to the track and ran 11.13 at 121.2 mph in the 90 degree heat with this new street combination.



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[OCMDGTO]

Run what you have Will!!

[grivera]

Originally Posted by Steve C.

Stated- " I'd like it to be well into the 11s. "

Do you have a estimated race weight with the combo ?


.

I don’t have the weight yet, I’m sure the aluminum top end alters factory weight but maybe off set by the TH400 and the Gear Vendors

Originally Posted by i82much

i would run the cam you have with the 1.65 rockers, t2 with open or tapered spacer, and a vacuum canister.

i am not an auto trans guy but i would imagine if you err toward a looser converter, you can run a higher idle rpm to get a little more vacuum out of it. an rpm intake might help with low end signal as well.

I’d like to avoid a vacuum pump if possible, not sure if the RPM intake will work Ok with the flat hood

[i82much]

Originally Posted by grivera

I don’t have the weight yet, I’m sure the aluminum top end alters factory weight but maybe off set by the TH400 and the Gear Vendors



I’d like to avoid a vacuum pump if possible, not sure if the RPM intake will work Ok with the flat hood

not a pump, just a reserve canister:

https://www.jegs.com/i/JEGS/555/6301...caAuGPEALw_wcB