I ran that exact set up back in about 1987…. 350 4 bolt with a 327 .010/.010 crank. Fully balanced rotating assembly. Standard bore 10:1 JE’s with 1.94/1.50 double hump heads with screw in studs and guide plates and Manley valves. Solid Isky cam z-28 grind with crane roller rockers. It was in a ‘69 chevelle w/turbo 400 and 4:11 12 bolt posi. It was the most fun car I’ve ever owned. Won a lot of beer money street racing SoCal back in the day. 😁

I know some guys teenagers when we were kids, they put a small journal 283 crank into a small journal 327, thinking they're going to make a lot of RPM, but they're short come was no compression. Yes it would wind up standing still but no power. Even when it had the old fashioned power pack head's. 3 inch stroke to 3.25 in stroke eagles Pistons sitting down in the bore about a 1/8 of an inch.

By the way something 307 blocks can be bore out to 350. Industrial 307 crank is made for a lightweights pistons.

Those are the kind of cars that win in a Head On Collision 😁

My God hold the camera still

The only concern might be factory balance on the crank. The smaller 307 pistons the crank was factory balanced to is lighter than the 327 pistons you will be using. I dont think it will be a problem in stock application.

Good info

Better hang on to that 283. They're getting harder to find here. I have one setting under the bench I won't sell. I'm building a 327 large journal right now. Great motor with the Vortec 906 heads and a decent cam but I hear what you're saying about using up what ya got. Looked like double hump heads on the one under the bench. I'd think twice about getting rid of that one too. Good job.

Try to run a hydraulic roller cam in it and use the roads lifters with the bleed down hole and then you should get better gas mileage when you're cruising on the highway

Also want to build a 327,so I can use 350 Blick and 327 crank, wich rods and pistons?

I'm sure you meant "destroked" not "destroyed to a 327" but in a way you aren't wrong. Give a 350 the parts folks enjoy sticking on a 327 and you've made a better street engine--ie, torque below 6,000 rpm. when people say an engine "feels strong" what they really mean is it makes torque in the 3,000-4,000 rpm range, and it feels strong since after every shift, the engine returns to the RPM range where the torque is not missing. a 307 crank is often a cast crank (narrow parting line) to go with 4 bolt mains, but when playing with stock crank swaps (your 305 blocks have the 350 stroke but are balanced differently so use a 305 balance and flywheel) remember the journal sizes changed in 1968, otherwise you'll need oversized bearings to match things up. hopefully at least one of those 305's have uncracked Vortec heads. That on a 283 with the 270 hp cam will get you at least 250 hp on pump gas compression ratio--the real problem will be the factory 2 speed automatic :) a THM700R4 will make even 250 hp seem like something. smaller displacement can make for better fuel economy, as well as higher compression, but increasing displacement helps make the more torque at lower rpm (all other things being equal), so you don't need to step on the gas to pass--which will help fuel economy. the aluminum heads will help give you a point more compression on pump gas and that'll help make the engine 4% more efficient.

No offense, your camera technique makes me dizzy.