Robby12

I have a set of gone threw 193 swirl port heads(new guides,Re-surfaced,3 angle valve job,mild porting,120lbs springs,all new hardware) given to me they look jest like the vortec heads but there not iv been told there great ware torque is needed they have have 64cc combustion chambers because there swirl port heads i was told there only good up to 4,500rpm What do you guys think about these heads any one have any experience with them form what i see some people like em some people hate em i don't know why but im having a hard time finding vortec heads i thought these where vortecs till i ran the numbers and can i run a vortec intake with these are they better then the stock 350 heads back in the day?

My engine
1970 350 2 bolt
4.000 bore
268h comp cams 454/454 lift
Flat top pistons(cast speed pros)
1.5 roller tip rockers
750 holly
Msd hei
jest started this build so its all fresh

this is all going in my 1970 Monte carol it had a set of cracked 882 heads i want to run mid 13s in the 1/4 mile the car weights around 4075 lb

megtom2

Swirl port heads on "vortec" 350 engines from 87 or so until 95. They will help your gas mileage but won't help performance. You can buy them all day long from fliteline for $100 each completely rebuilt.

sofakingdom

iTrader: (1)

Ummm,,,, ..... no. The swirlies have their intake ports in the old location, like all old "pre-Vortec" heads. NO WAY to confuse them. You can spot the difference from 100 yards away.

Not to be mean; but, ever heard of the concept of "polishing a turd"? (like, what do you have when you get done doing that?) That's what just happened.

And even THAT is somewhat optimistic.

Can't imagine how; they're EVERYWHERE. 96-2000 Chevy/GMC truck 350s ALL have em. Just go to the junkyard and tell em you want heads for your 97 Chevy truck. DO NOT utter the word "Vortec", DO NOT come across like a hot-rodder, pretend (or maybe you don't have to? that's cool too) you're a plumber or a tree service or something and need to get your work truck back on the road, have em hand you a set of heads and look for castnig # 906 or 062, don't take em if they're not, don't tell em why, just tell em these don't look the same and mutter something incoherent about the intake bolts, make em bring you heads until you see the right thing.

No. Vortec intake ports won't line up with the head ports in the swirlies (or any other heads besides Vortecs).

Not really; they just suck in a different way. There's lots of ways for heads to suck.

Then throw those swirlies away and quit spending money on em. NO WAY IN HELL they'll get you anywhere close to 13s in that sled.