What Carb for Poly Stroker

AJ/FormS said
I did not know that;
But looking at this
View attachment 1716171473
I can imagine a spread-bore of some kind on there, without too much work.

The reasons I like a spread-bore for this combo are;
it's already a 10.8 engine and
the small solid cam is gonna have an early closing intake,
which means those two together, are gonna cause the cylinder pressure to climb, maybe too high for pumpgas. I mean, the Wallace calculator is predicting pressures between 182 and 190 psi!
But IIRC, the chamber design of that engine has no quench, nor squish, so
That leads me to imagine that it may be detonation-prone at lower rpms. IDK, I've never had a poly.
Small Primaries may help to keep the Effective compression pressure below the detonation limit, with pumpgas. Then, just adjust the secondary throttle-timing to be a lil lazy, and it might survive.
If a spreadbore is impossible, then second choice is a vacuum/AVS-type, secondary.
Altho, if it was mine, I'd be trying very hard to make a 750DP work, cuz if I break it, I can fix it.
What I'm really saying is that besides the TQ, I'm no fan of vacuum-secondary carbs, and in particular, not a fan of the 1850; unless it's for cruising in overdrive................. they work ok for that, if you know how to doctor them.
No matter what you choose;
Happy HotRodding

You're correct on being detonation prone on pump gas, and yes it could probably do with a bigger cam but that's the one that I had in there when it was a 318 and I was led to believe it would work ok with the stroker...which it does, but it's a bit small. The custom pistons have a small quench pad in them.
It runs great but if I put too much timing into it it pings. I'm at about 13° initial, 34 all in. If I add any more initial it pings. I've now switched to Manifold Vac Adv and put a limiter in the distributor on the vac adv mechanism as that was making the detonation worse.

I will consider a bigger cam, or maybe lowering the compression a bit with thicker head gaskets(?). I know when I do add in a bit more timing the engine seems to like it - aside from the detonation obviously. I was wondering whether I'd be better of at say 9.5:1 with a lot more timing, as when I've had the car at say 18° initial and tried it on my local "test" area it feels about 50hp more powerful instantly.

But this is all just thinking and considering options. The car runs absolutely great as is, no bad manners at all, has plenty of power and sounds good. But we're never happy of course - human nature, always looking to improve.