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Old 06-14-2010, 02:31 PM
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350 block, which heads?

hello all

ok so i have three sets of good heads(mechanically speaking) i don't have money to go out and get new ones so which ones will better suit my engine i have .041 gasket. 4v relief pistons will be using either torker2 or Holley contender intake 600 cfm carb holey vac. sec. which of the three listed will give better performance( i am planning daily driver with 1/4 mile trips). this motor will be going into a 3500lbs 68 chevelle 350 th, 3500 stall 3.08 gears to 295/50s...


#1 333882 1.70 1.50 63-65cc
#2 354434 1.70 1.50 60cc
#3 93417389 1.94 1.5076cc

#3 is hecho en Mexico

please help me

thank you to all

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Last edited by velle307; 06-17-2010 at 09:25 PM.
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Old 06-14-2010, 03:19 PM
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None of them are any good performance wise, but if I had to pick I would choose #3 on your list, the bigger valve size is more important than anything else. Hencho in Mexico is not necessarily a bad thing.

Use the Contender intake, the Torker II is a really poor performing piece.

By the way, where did you find the chamber cc listings for all your heads?? The 63-65cc figure for the 333882 head is way wrong, they are 76cc heads, and poor ones at that, crack prone junkers.

If it was me I wouldn't use any of what you have if you expect much performance.
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Old 06-14-2010, 03:36 PM
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If the engine is basically stock (cam, pistons) I'd just save up for a set of Vortec heads and an intake to fit them.

The Vortec's are worth a considerable amount of power over any of the heads you already have. I'd craigslist the smogger heads and intakes to help pay for the V's.

Good luck.
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Old 06-15-2010, 03:20 AM
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hello
i know that vortec heads are good prolly the best but this is what i have, and in my area there isn't much or anyone who will want my intake or heads, so please if you will, help me, pick the best of three please.


i am trying to get this motor in and started fairly quickly so help is very much appreciated,... Thanks
Travis
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Old 06-15-2010, 04:05 AM
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I'll go with eric. #3.
Can't seem to find that number though...(83407389)
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Old 06-15-2010, 10:54 AM
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Quote:
Originally Posted by velle307
hello
i know that vortec heads are good prolly the best but this is what i have, and in my area there isn't much or anyone who will want my intake or heads, so please if you will, help me, pick the best of three please.


i am trying to get this motor in and started fairly quickly so help is very much appreciated,... Thanks
Travis
OK, Trav- trot back out and get the right number off of heads #3 to see what they are (prob. 33417369; 1990-up; 350cid). But if they are all you have w/1.94's in them, that's your answer.
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Old 06-15-2010, 02:21 PM
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Quote:
Originally Posted by cobalt327
OK, Trav- trot back out and get the right number off of heads #3 to see what they are (prob. 33417369; 1990-up; 350cid). But if they are all you have w/1.94's in them, that's your answer.
That's what I was basing my recommendation off of, it is his only set with decent size valves in them, didn't even bother to actually look up that casting # to see what it really is. The other casting #'s I have in the memory bank
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Old 06-16-2010, 01:16 AM
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thanks to all who have answered my questions and i am definetly going with them there on my block already,... i have measuredthe cam profile and the readings are .274 lift for both intake and exhaust is this a stock cam grind number is 115213 ... thanks for all info

Travis
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Old 06-16-2010, 01:35 AM
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The info on the heads 33417369 was used on the 290 horse GM crate engines. It says it`s very similiar to the 882 casting. If they can get 290 horses out of a choked up smogger replacement engine then perhaps with a little bowl porting and a back cut on the valves you can get a decent power number with them.
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