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Mar 28, 2020 | 10:06 PM

#16

baddad457

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Joined: May 2003

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From: south louisiana

What did you do to the heads ? Mine struggled on hills with the 3.55's. Wanted to downshift even on overpasses running empty with no trailer.

Mar 28, 2020 | 10:17 PM

#17

Ronald Kramer

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Quote:

Originally Posted by baddad457

What did you do to the heads ? Mine struggled on hills with the 3.55's. Wanted to downshift even on overpasses running empty with no trailer.

ported the chambers and opened up the runners some, removed the thermoactor bump in the ports

Before

After

Mar 28, 2020 | 10:22 PM

#18

Ronald Kramer

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Quote:

Originally Posted by baddad457

What did you do to the heads ? Mine struggled on hills with the 3.55's. Wanted to downshift even on overpasses running empty with no trailer.

i should probably re gear it but im running at a good rpm on highway, i do have 32.5 inch tires and could probably use taller gears

Mar 29, 2020 | 08:14 AM

#19

baddad457

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Joined: May 2003

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From: south louisiana

Quote:

Originally Posted by Ronald Kramer

i should probably re gear it but im running at a good rpm on highway, i do have 32.5 inch tires and could probably use taller gears

The port work will do wonders. You really need a taller rear gear to go with those tires. I'm running 28 inch tires on mine (275/60-15 on classic aluminum slots for the 70's look)Mine's turning 2700 rpms at 75 mph right in it's sweet spot. I should have gone with 3.73's but wanted the oomph to pull a trailer in the mountains. Mileage on the highway at those speeds didn't change at all.

Mar 30, 2020 | 08:06 AM

#20

bootless1075

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Joined: Oct 2018

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Quote:

Originally Posted by Ronald Kramer

that’s good my current motor will barely pull itself up a hill lmao are you still using stock intake and throttle body? I thought about oversized bbk throttle body but i dont’t know if it’ll actually make a worthwhile improvement

all I have done is cam gt40 heads 1.7 roller rockers 4.88 gears everything else is stock