You need to drive over here to my place and I will set you up with a 250...or a 200....or a 170. I have all 3 motors here looking for new owners.
In keeping with the honesty in advice qualification thread, I am not a mechanic, never have been a mechanic, and never will be a mechanic. So take this advice for what it is worth!!! Detination can also be caused by the timing being to far advanced, not only too low of octane. As this is an older engine, and there are less and less real mechanics that actually work on this stuff, your mechanic may simply have it too far advanced. Easy to check...1st scribe a line from the engine block onto the base of the distributor (that way you can return it to the current timming if you get things screwed up) 2nd lossen the distributor locking nut just enough that you can turn the distributor, but not so lose that it will turn on its own. 3rd start engine and slowly and only slightly retard timing by turning the distributor clockwise (I THINK) snug the lock nut, take it on short test run preferably up a short hill. Repeat process untill knock goes away. If it doesn't get rid of knock, and it starts running like crap, return it to the scribed line you made in step one, and you will be no worse for having checked. Just my opinion, as I had to do it to my '71 300 I-6 last weekend, knock went away, power improved, feul economy went up. It is free to do, only takes one wrench, and if you mark the existing timing you can put it right back without messing anything up. Good luck, Lou
I just put a newly rebuilt 5.0 bored over .040 in, with "new" gt40 heads, roller cam, roller lifters, etc. for around $600. So see if there aren't other alternatives for you before you sink $1200 into a 6 cylinder engine...
Yeah I am just getting this so i can run it until I save money for a replacement he told me to swap a differnt motor it would be $525 so at min I can just get another 6 cheap and plop it in there, I am looking into maybe a 302 swap.
bye bye little buddy yeah, if you remember, they had to upgrade the topping plate to the throttle body with the NOS and other upgrades. I have heard a few people converting the mavs I-6 carb and swapping on a EFI from a chrysler, the wiring is still a pain though, as with any EFI system.. the K car EFI sufficiently handled the I-6 stock...but with upgrades it needed more. They also had to make a custom mounting plate i believe out of aluminum laying around.
