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That will work with your current open? carrier or a 2 series posi carrier. There are thin and thick gears available in most popular ratios, that is why they say 2 or 3 series. This is because most factory carriers are 2 series. For your rpm calculations add 250 to 300 rpm for converter slippage. So with a stock 25" tall tire, you will run 2900 at 60 mph. Seeing how everything is far away where we live, a 3.08 gear might be better.
I dont know, I sent them a message.
Now all things considered, doing the engine, changing the gear ratio, 2200 stall, may as well yank the trans and rebuild it as well.
Something else to look forward to. lol
You need a block off plate and a quality, quiet fuel pump properly plumbed. It makes Procomp or Edelbrock aluminum heads an easy swap, mechanical pumps won't work with them on a 350.
Well heads of to the shop today for magnafluxing, hope to start porting them soon.
Block all wrapped up and ready to ship off to the shop for machining.
Last edited by Kyle's77cutlass; April 16th, 2019 at 09:11 PM.
Well both sets of heads checked out good.
Have a set of 7a's and 8's to work with.
Hope to start porting and polishing them this weekend. Noticed a big difference in the pocket from the 7a's and 8's. The 8's are shaped differently around the guide and is no slope on the wall that comes into the chamber. It's a straight wall,I take it this is why the 8's dont flow as well.
If you want a better mechanical fuel pump try the RobMC fuel pump . it may interfere with you A/C if you plan on running it if you are not gonna run A/C it's worth the money.
So if the factory stall is already 2400, wont make much sense to buy a 2500?
I heard rumor there was a better converter in those cars but didn't want to say. It might not hit the 2400 stall rating but it is no doubt a huge improvement over the regular 1600 flash stall everything else got. I know the 2400 stall behind the 80's Hurst/Olds and 442 stalled around 2000 rpm. But that was behind 170-180 hp and 250 ft/lbs of torque.
Don’t be too hell bent on removing a bunch of material out of the ports. You’re not going to be spinning it that high so you don’t need to increase the volume by much, just the flow.
Last edited by cutlassefi; April 22nd, 2019 at 11:45 AM.
Yep, Not going hard at it.
Just cleaning it up so they flow nicely, will try to teardrop the bosses tho. Not sure how nice they will be, not much material to remove
Well some parts are in, thanks to Mark. Hope more is in this week. 😁😁
Been steady week cleaning the heads up. 1 almost completed, other about half way. Be nice to ship those to the shop for rebuild soon.
Block was hot tanked last week, machining starts tomorrow.
looking a valley pan gaskets, Fel-Pro FEL-MS96009 Sealed Power SLP-260-4010
Any insight?
The Felpro valley trays have always fit well. I have used other brands with luck, others have not. It is crazy Summit won't ship any of the tray gaskets. The the center crossover is why there is two different gaskets. The #8 heads have bigger crossover's vs the earlier heads.
Those the 7A heads? The one pic almost looks like the #8 bowl area. Looking good, can hardly wait to see it all come together.
Yes they 8's. Wanted 7a's but scared to bring compression 10 or over. I am surprised, my first porting job and turning out nicely. Trying to find the proper tools here isn't easy. Lol Curious to see how they will flow. Even cleaning the oil ways so the oil has less resistance to get back to the pan.
Hope this head out Tuesday..
The Felpro valley trays have always fit well. I have used other brands with luck, others have not. It is crazy Summit won't ship any of the tray gaskets. The the center crossover is why there is two different gaskets. The #8 heads have bigger crossover's vs the earlier heads.
Okay, well I will be filling the heat riser so shouldn't bother.
Yes, basically the early gasket 96009 won't cover the #8's crossover passage properly but filling the heads should make it a mute point. Just get the more common Turkey tray for the 73 to 85 307, 350 and 403, MS96027.
Okay thanks for the input.
Well heads cleaned up not to bad. I am impressed with my work with them, first time porting heads.
Took time tho, around 50 hours into them.
Now just weld center exhaust port and fill heat risers. The only issue with that, I have no scrap pistons. Threw a bunch out last year from the 394 I torn down 😟😟
Scrap pistons are horrible buy an ingot . The aluminum in pistons is not very clean. You will end up with less than ideal material from my experience .
Thanks 76olds. I am debating to buy some valve grind material and polish them more. Was hard to do a nice job along the side if the chambers.
If I can find a small polishing disk for the diegrinder, will attempt once more before I ship to Winnipeg
April 14th, 2019, 01:22 PM
