motor mount frustration... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

all4gss · 03-13-2003, 02:21 AM

hello all,

need some direction here. I'm swapping out my 250 straight 6 for a 350 sbc. I got a vortec long block to stick in here. I've heard all over the place that the motor mounts for the 250 straight 6 and the 350 sbc mounts are the same on the frame side. Since the long block i got didn't come w/ any motor mounts (for the block side) i purchased a flywheel and motor mount combo from Ebay. So i go out, pull the straight six. clean up the engine saddle and the frame rails around it. push my long block on the engine stand up a 30 degree incline that was about 40 yards long (up our driveway to the street where i'm having to work on my truck) get it up there. get the motor into position, and dagum the holes dont line up. so i get to looking and see that there are two holes above where the existing frame motor mounts are bolted to. I undo them and move them up... mean while we fall under a thunderstorm warning/tornado watch and i'm bustin nuckles and spouting the occational curse word trying to move these motor mounts up to the next spot.
So finally to my relief i'm ready to put the motor in again. Slowly inch it down w/ the cherry picker and get the passenger's side bolt in. I go around to the driver's side.... and oh my goodness, look at that. the holes still dont line up.

so i come to the conclusion that whatever i bought on ebay was not the correct thing for my little set up. That's not so bad.. except now my motor, a rented cherry picker, and random tools i couldn't find in the dark are all under a dirty tarp which wont stay down under 85 mph winds and it's all getting rained on.

so, i need to know if the motor mounts on the block side for this application are specific to a sbc in a c/10 pickup and also if by moving the frame motor mounts up i messed up what should have worked perfectly had i had the right block side motor mounts.

any help is greatly appreciated...

one frustrated mother trucker,

Keith

Tom · 03-13-2003, 12:35 PM

Man, putting engines in sure is a pain! I went from a normal 350 to a vortec 350 a while back. I put new motor mounts on for a standerd 350. It took me a good hour or two to get the sucker in. If I got one side on, the other side wouldnt line up right. Im pretty sure [but not posative] you were right in moving the mount postion up from the I6 spot. Good luck!

**Captkaos** · 03-13-2003, 12:39 PM

There are 2 posistions. Lower ( I6) and upper (V8) Actually if there isn't a ton of grunge on there they are marked. The actual piece that mounts to the frame are the same for the I6 vs V8.

all4gss · 03-13-2003, 06:31 PM

thanks,

I got up this morning at 6 and pulled it back out. nothing got too wet or gritty. cleaned everything back off and replaced the "vortec" motor mounts w/ some good ol' 350 mounts my roomate had. went in fine. one side still doesn't have the bolt in, need a stiff screwdriver to help finish up lining up the holes. But she's in there now. thanks alot.

Keith

alf4444 · 03-14-2003, 12:10 AM

that is what killed me on putting my motor in last weekend. Motor mounts are stiff when they are new!

*rage'nrat638* · 03-15-2003, 02:57 AM

jegs makes solid motor mounts for chevy trucks my 638 dart beat-up my energy mounts

03-13-2003, 02:21 AM	#1
all4gss Registered User Join Date: Oct 2002 Location: Rolla, Mo Posts: 46	motor mount frustration... hello all, need some direction here. I'm swapping out my 250 straight 6 for a 350 sbc. I got a vortec long block to stick in here. I've heard all over the place that the motor mounts for the 250 straight 6 and the 350 sbc mounts are the same on the frame side. Since the long block i got didn't come w/ any motor mounts (for the block side) i purchased a flywheel and motor mount combo from Ebay. So i go out, pull the straight six. clean up the engine saddle and the frame rails around it. push my long block on the engine stand up a 30 degree incline that was about 40 yards long (up our driveway to the street where i'm having to work on my truck) get it up there. get the motor into position, and dagum the holes dont line up. so i get to looking and see that there are two holes above where the existing frame motor mounts are bolted to. I undo them and move them up... mean while we fall under a thunderstorm warning/tornado watch and i'm bustin nuckles and spouting the occational curse word trying to move these motor mounts up to the next spot. So finally to my relief i'm ready to put the motor in again. Slowly inch it down w/ the cherry picker and get the passenger's side bolt in. I go around to the driver's side.... and oh my goodness, look at that. the holes still dont line up. so i come to the conclusion that whatever i bought on ebay was not the correct thing for my little set up. That's not so bad.. except now my motor, a rented cherry picker, and random tools i couldn't find in the dark are all under a dirty tarp which wont stay down under 85 mph winds and it's all getting rained on. so, i need to know if the motor mounts on the block side for this application are specific to a sbc in a c/10 pickup and also if by moving the frame motor mounts up i messed up what should have worked perfectly had i had the right block side motor mounts. any help is greatly appreciated... one frustrated mother trucker, Keith __________________ true power comes from above!!! 1984 C/10 2wd SWB.

03-13-2003, 12:35 PM	#2
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,760	Man, putting engines in sure is a pain! I went from a normal 350 to a vortec 350 a while back. I put new motor mounts on for a standerd 350. It took me a good hour or two to get the sucker in. If I got one side on, the other side wouldnt line up right. Im pretty sure [but not posative] you were right in moving the mount postion up from the I6 spot. Good luck! __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

03-13-2003, 12:39 PM	#3
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	There are 2 posistions. Lower ( I6) and upper (V8) Actually if there isn't a ton of grunge on there they are marked. The actual piece that mounts to the frame are the same for the I6 vs V8. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

03-13-2003, 06:31 PM	#4
all4gss Registered User Join Date: Oct 2002 Location: Rolla, Mo Posts: 46	thanks, I got up this morning at 6 and pulled it back out. nothing got too wet or gritty. cleaned everything back off and replaced the "vortec" motor mounts w/ some good ol' 350 mounts my roomate had. went in fine. one side still doesn't have the bolt in, need a stiff screwdriver to help finish up lining up the holes. But she's in there now. thanks alot. Keith __________________ true power comes from above!!! 1984 C/10 2wd SWB.

03-14-2003, 12:10 AM	#5
alf4444 Registered User Join Date: Dec 2002 Location: taylorsville, UT Posts: 778	that is what killed me on putting my motor in last weekend. Motor mounts are stiff when they are new! __________________ 2011 CCSB GMC 2500HD DMAX 73 GMC 3/4 ton 4x4 96 Chevy 1500 STD Cab Shortbed Z71 Owner of WickedWolfRC.com

03-15-2003, 02:57 AM	#6
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	any body want solid mounts????? jegs makes solid motor mounts for chevy trucks my 638 dart beat-up my energy mounts



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