swap out the slant 6

Ohh, this is only the 4rd time trying to post this F$%^*( response, so bear with me, heres a short version;

No one I know of makes a poly swap kit. I think the "LA" mounts would work though. IMO, skip it in favor of a "LA" because of the plentyful over the counter part selection and save money while your at it. Not to mention weight.
The swap to 4spd doesn't make it easier. Just alot of fun once you get it right.

I did this here; http://www.forabodiesonly.com/mopar/showthread.php?t=10508&page=1&pp=20 Click it and read on.

Yeah, if you have the old poly engine for sure (you're sure that's what it is, right?) you have a pickle of a job on your hands and unless you are really an amazingly good mechanic for 17 years of age I'd vote a definate no on that!

Check the AllPar site for details on the size and weight of the poly engine. The old Direct/Connection hotrod books don't even offer any advice on hot-rodding this engine ... while they do for the /6. Advice in general will be major hard to come up with.

On the other hand, advice for the /6 is right here ... http://www.slantsix.org/
... so, before you do anything at all ... I'd look at this site. This will be much easier on your time and budget, you'll stay with a better handling car with almost perfect front/rear weight distribution and save yourself alot of parts chasing. Not to mention that, at 17 years old, it should help keep you out of some trouble ... I was 17 once and can recall all too clearly where my head was at ;o)

If you do go with any V8 at all - that rear axle will have to go too ... so plan on that in the budget.