They are both hard to find and expensive. LOLYeah. But the factory 4 barrels do pretty dang good too. Surprisingly good.
They are both hard to find and expensive. LOLYeah. But the factory 4 barrels do pretty dang good too. Surprisingly good.
Yep, oughta sell mine hahaThey are both hard to find and expensive. LOL
I did find on my heads, the intake ports were great, but my exhaust ports needed help. They seemed way off to what Gary has experienced. Maybe just a bad set. I think a 360 poly would be the best size for these heads. You can go bigger, but I think the heads, even with full porting, become a limitation. Just the same as stock wedge heads.Intakes are limited to basically a Weiland aftermarket one for 600+ or a factory 4 barrel, 6 pack or , dual quad, all of which can run from 350-900.
the poly heads will out perform any LA head, stock for stock even more so with porting and polishing.
Headers are essentially limited to TTIs, or you can custom modify a set from a Mustang GT or 351 to fit.
you can also modify an LS intake to fit as well, both are easy to do.
cams can be custom ground for under 200.
I’ll get into more specifics in a later post. Busy at the moment but gives you a few things to think over
Polys were stopped for two big reasons, 1: they cost more to produce per unit and two, the sheer weight. They weigh almost as much as an RB block. And are WIDE AS HELL.I did find on my heads, the intake ports were great, but my exhaust ports needed help. They seemed way off to what Gary has experienced. Maybe just a bad set. I think a 360 poly would be the best size for these heads. You can go bigger, but I think the heads, even with full porting, become a limitation. Just the same as stock wedge heads.
Polys were stopped for two big reasons, 1: they cost more to produce per unit and two, the sheer weight. They weigh almost as much as an RB block. And are WIDE AS HELL.
But yeah, the exhaust breathing leaves some to be desired
They are DAMN heavy! I replaced the heads with the engine in the car. Tried to go over the fender and it pulled my feet off the ground. Had to stand on the K member and lower them on that way. And if the OP does buy one, just make sure you don't get a Canadian special hydraulic cam engine. That valvetrain is a PITA!Polys were stopped for two big reasons, 1: they cost more to produce per unit and two, the sheer weight. They weigh almost as much as an RB block. And are WIDE AS HELL.
But yeah, the exhaust breathing leaves some to be desired
If I have to do a rebuild on this one, that is the route I'm going. 360 crank with 318 mains. Bore .090" over since you can with these blocks. And give the heads some more attention. The intake side on mine flow 220 at .450 or .500 lift. The exhaust is another story.dartfever, not that I have any experience with the engine or heads, but it seemed to me that would be a great combo. Or maybe just a cut down 360 crank in the Poly.
just like guys building ford fe motors, except there's more aftermarket support for them of course.The poly is forth the guy that appreciates making power from something different, likes the challenge is not afraid to spend some $$. Otherwise just build another SB stroker??
Bruce Toth is a great resource. Gary Pavlovich is the ultimate poly guru. Both guys know those things inside and out.
Perhaps Gary is trying something new. Who knows, you’d have to ask Gary that if true.Hmm,really.. then why is the engine builder I know building Garys stroker
Dig out the old Direct Connection manual. There a ideas in there that are probably still valid...given that the parts are still available. Talking with Mr.Toth, his recommendation was not to use an intake valve over 2.00" because it could run into water. Compared LA and Poly rocker shaft today, my eye ball micrometer says they look like the same length and diameter but mounting holes in different locations.If I have to do a rebuild on this one, that is the route I'm going. 360 crank with 318 mains. Bore .090" over since you can with these blocks. And give the heads some more attention. The intake side on mine flow 220 at .450 or .500 lift. The exhaust is another story.
This is my current poly in my 65 Dodge which is a test mule for the new engine that I'll install this winter. Stock displacement, ported, bigger valves, 1.5 / 1.6 rockers, Magnuson on modified Weiand 7503 manifold, Ford 351 headers, reground factory cam to new profile, etc. etc.
- EM
that is a work of art , can't say I've never seen a setup like that .
do they make a supercharger with a lower profile to fit an LA block ?
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