th350 or 700r4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lax54650 · 02-20-2009, 08:40 AM

i am still debating about which trans to put back into my truck. i have a basicly stock 350. dual plane intake, small cam, block hugger headers 500 cfm eddy. 3.08 gears. i have the original th350 long shaft that needs to be rebuilt. would i need to alter the drive shaft to use 700r? or just move crossmember back a touch. will it be too sluggish in od?. will i actually gain any mpg? is my rear too high geared? or would it be useable? i believe i can get a 700 built for around $800 and the th350 for $500. please let me know all your thoughts is there anyone running 700r 3.08s what tire size? and do you like it?

02-20-2009, 08:40 AM	#1
lax54650 Registered User Join Date: Aug 2008 Location: lacrosse wi. Posts: 426	th350 or 700r4 i am still debating about which trans to put back into my truck. i have a basicly stock 350. dual plane intake, small cam, block hugger headers 500 cfm eddy. 3.08 gears. i have the original th350 long shaft that needs to be rebuilt. would i need to alter the drive shaft to use 700r? or just move crossmember back a touch. will it be too sluggish in od?. will i actually gain any mpg? is my rear too high geared? or would it be useable? i believe i can get a 700 built for around $800 and the th350 for $500. please let me know all your thoughts is there anyone running 700r 3.08s what tire size? and do you like it?



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