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'63GENIII · 07-01-2015, 04:54 AM

My '63 with 35's would turn 3k at 70. I ran it like that until I put in the 4500. Then it dropped down around 2400- 2500. I think that the 400 was on its last leg and slipping as well.

07-01-2015, 04:54 AM	#7
'63GENIII Registered User Join Date: Sep 2008 Location: San Carlos, Ca. Posts: 3,048	Re: High rpm for mph My '63 with 35's would turn 3k at 70. I ran it like that until I put in the 4500. Then it dropped down around 2400- 2500. I think that the 400 was on its last leg and slipping as well. __________________ Chris '63 k15 long step Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205 52" front and 63" rear spring swap D44 / 14bff - disc axles Milemarker 9K and 10.5K hydraulic winches 63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29