55.2-59 move engine forward question

[jmlloar]

its not real clear in the pic but the rad is inside the support.

[joedoh]

Originally Posted by jmlloar

this truck is an unmolested 55.2 gmc built in pontiac. Its rad was mounted inside the support, not behind it. I've had plenty of the ad series trucks, this is not one of those.

looks like a 3/4 or 1 ton and they just adapted the AD core support to it! that is definitely the shape/design of the GMC AD core support, I have a couple here at the house for comparison. yes, the rad mounts inside it because the GMC inlines were slightly longer than the chevies.

very interesting truck thanks for sharing the picture.

[jmlloar]

Yes its 3/4 ton. Thats what it looked like when I got it. only useable pieces of body was the rad support and some of the brackets. I have a cab, doors and hood but still need fenders, front trim, and bumper guard.

using original frame, front axle, and sm420

Replacing orginal rear with a 14bolt from 99 1ton single wheel.

[jmlloar]

here is 2inches engine forward

[jmlloar]

update

Used individual side motor mounts. engine 2 inches forward from factory. 4L80e fixed yoke tranny. used lsx mount adapters with pass side cut to clear a/c pump and drivers side not modded. pass side mount 2 holes back from the drivers side one. drivers side forward as far as possible to gain steering box clearance. So far so good.

[jmlloar]

On to the next issue.

to use the 4L80e the factory rear crossmember must be removed. What is everyone using to keep the frame from flexing at the spring hangers when doing this? This is an issue for me since I'm keeping the I-beam axle and not gaining an under the engine crossmember.

[jmlloar]

centered with plenty of clearance