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**67 cst swb** · 01-30-2008, 01:58 PM

So, Big Block/TH400 going into a '68 low hump cab (originally a 307/3-speed on the column)

OK, so here are our current options...
Use the Small Block stands with Big Block Rubber Mounts on the Big Block engine, but must use headers as there is stock manifold issues... This Option is the cheapest, as Headers were in the plans already and we already have SB towers....

OR...

We thought of purchasing the Big Block 72-later style mounts from ECE

Either way... (am I understanding this correctly?)
We will need to find a TH400 crossmember or build a tubular one, as it is not the same as a stock TH350 crossmember... I thought a Auto crossmember was an Auto crossmember...
Also... my '67 (originally a 327/TH400) will it have the correct crossmember if TH350 & TH400 x-members are different???????

Sorry for all the questions.... I've never ran, nor had the desire to run a Big Block... It's the friend of mines project,... and yes I'm trying to get him on the board.

01-30-2008, 01:58 PM	#8
67 cst swb Senior Member Join Date: Nov 2001 Location: Rapid City, SD Posts: 2,281	Re: Big Block Motor Mount Question...? So, Big Block/TH400 going into a '68 low hump cab (originally a 307/3-speed on the column) OK, so here are our current options... Use the Small Block stands with Big Block Rubber Mounts on the Big Block engine, but must use headers as there is stock manifold issues... This Option is the cheapest, as Headers were in the plans already and we already have SB towers.... OR... We thought of purchasing the Big Block 72-later style mounts from ECE Either way... (am I understanding this correctly?) We will need to find a TH400 crossmember or build a tubular one, as it is not the same as a stock TH350 crossmember... I thought a Auto crossmember was an Auto crossmember... Also... my '67 (originally a 327/TH400) will it have the correct crossmember if TH350 & TH400 x-members are different??????? Sorry for all the questions.... I've never ran, nor had the desire to run a Big Block... It's the friend of mines project,... and yes I'm trying to get him on the board. __________________ My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White Last edited by 67 cst swb; 01-30-2008 at 02:03 PM.