Stop in for a cup of coffee

Princess Valiant said
So @dukeboy_318 have you ever driven a poly out on the highway??

The reason I'm asking is because I'm looking for real world reviews on a poly.

I'm still on the fence on what to do with this one. I got it started and it needs a carburetor, because it just diarrhea ***** fuel everywhere.

Sounds strong but ...... to be debated.

Only in an old truck. So not a good comparison.

Mopar Tim said
IMO poly might be a better engine then the LA 318. Solid lifters, better valve geometry....I have never seen one hot rodded....

Really? There’s a cult following of guys and gals who’ve hot rodded them. Heck, the factory even made 6 pack and dual quad manifolds for them. Factory versions of those made nearly 300 hp in the late 50s and early 60s. There’s several polys around that can give Stock big blocks and hemis a run for their money.

biggest reason they’re not more mainstream is simply the piston and cams. Both have to be custom ordered and that nearly doubles the price compared to even a big block. Plus they weigh almost as much as a 440. The heads are MASSIVE

but the poly heads flow more than the LA heads by far. IF You put headers on them. The heads and valves themselves have great flow, nearly comparable to aftermarket LA heads, but it’s the log manifold that chokes them down, badly. There’s a video of a guy on an engine dyno with his stock but rebuilt poly. They did 4 pulls with stock manifolds before swapping on a set of Fox body 5.0 headers, they gained an average HP of 95 hp over their baseline, without anything else changing.

Princess Valiant said
My debate is junk the poly and install a 66 dated 440 that I have under my work bench. Or keep the poly.

When I bought the car I didn't even think it had an engine, didn't care, wanted the body.

Then i get it cleaned up and i find a running poly that was rebuilt in 1996 and has the complete a/c on it. This car is mega original and complete.

Now I got the poly running again ...... but
Not sure

you’re in the same debate I am in. My thought is this, if your poly is running and showing no issues, stick with it. If it’s gonna need torn apart, may as well go 440. That’s where I’m at anyway