The Stovebolt Site Forums The Shop Area Driveline V8 conversion

hi guys, i want to put a 350/350 in my 49er 3100, must i remove the second and the third crossmember from the frame?

Lots of modifications are involved. We need to know a few more details, such as whether or not you plan to run the original front axle or install independent suspension. The original steering gear will have clearance issues with the exhaust system of the V8. You will definitely need to change the rear axle to an open-driveline type, and add a crossmember under the rear of the transmission.
Jerry

After having swapped V8 into a small assortment of vehicles, the AD Chevy truck (which I have not done one in) has looks of one of the more simpler installs, mostly do to space.
But it also still has all the standard swap requirements and modifications.

this page has some good links, especially look at "advance adapters" for special tips: http://www.trucktrend.com/how-to/engine/0404mt-v8-conversion-engine-swap-guide/

There are many weld-in and bolt on cross members for transmissions and side engine mounts that are universal fit and likely some exact fits. Search your options and find the one that meets your needs.

As for throttle, use LOKAR cable throttle (unless your going fly by wire) again they make various kits with or without pedal. The cable kit is flexible and easy to install and very reliable.

As for exhaust unless your dead set on headers which can be custom made for even the tightest of clearance issues. Stick with the classic Chevy 350 cast rams horns if they will bolt to your version of heads, if they will not then find after market version for your heads. These a very efficient, look classic and take the least space for side clearance.

As for cross members remove only as last resort, notch or modify first, if removed make sure you see if a custom built cross member or relocated cross member can be fit.

I bought a book, 30 years back, that was the install guide for small block Chevy swaps into any thing, it was loaded with tips, dos and don't if I can find its name I will post.
It had all the info from engine leveling, firewall spacing issue fixes, different water pump mods for radiator spacing, of course rams horn manifold. motor mounts, radiator options and more.

Every swap of a V8 into any vehicle is different then others, part of the fun of it. Your truck will be unique!
If some one else has done it one way does not make it the best way or the a right way.
SO PLAN, DRY FIT, MEASURE TWICE.
But do get it done and enjoy the build.

thanks Hotrod Lincoln and 48 Yuma rebel,

i have an 350engine, Th350 box, open rear axle,engine and gearbox swap kit, power steering mounted outside the Frame and more smaller parts like the Lokar and i am planing and measuring like the 48yuma rebel recommend but i didnt know if i have to remove 1 or two cross members

Keep focused on replace versus remove and things will look much better.
You will not use the front cross member for motor but need not remove if your balancer and pulleys have clearance based on where you set the engine up in front of the firewall. If a small section is in the way and you can cut clearance, then strengthen by welding a lip onto the cut area. If you have to remove the front cross member then look to replace with tubular or slotted beam model to keep frame strong.

You can also pick a cross member V8 motor mount kit, or buy a frame only mount kit but adding the cross member again adds strength.

And the bell housing member will be replaced with a new cross member mount likely moved to place in the location based on engine with transmission placement.

HI, im in the middle of this swap right now. In the UK there are certain legalities where cross members shouldnt be removed. Since i am sticking to "the rules" i have had to make up a small transmission tunnel on the cab floor to give enough clearance for the trans over the cross members. So i would say if you dont want a trans tunnel then you will have to remove/replace/modify the cross members.
I have also moved the engine over an inch to help with header/steering box clearance - it will still be tight, and i plan on making the headers to fit.
Hope this helps.