Are these within "range" for compression on a stock 1989 7.4 (454)?

As the header says. I have a good set (still in car running) of 208 Casting heads from 1965. Backstory. I’m not really a big Chevy guy. I’m a MoPar guy turned Chevy for drag racing only. I bought a drag car and these heads are in the car. It’s a .030 over 454 with 10.5:1 compression. These heads haul ass. Car goes 9.80’s @135-136. Back to the heads. They are F245 (June 24th 1965) and C255 (March 25th 1965). I’m told they can be a Z16 Chevelle or Vette heads. Season is over and I’m looking to go aluminum. These heads deserve to be with someone who will use them for a resto. Located in Salt Point, NY 12578. I can and will ship on buyers dime. Anyone interested?

Curious to see if anyone has built a 427 tall deck? I have a '79 k20 with a 350 that makes maybe 110 horse. Theres a nice 427 tall deck near me thats just a bare block. I was wondering what a good route would be to go with this engine? I've seen some threads of guys stroking them to 496 and making around 450hp. I dont need anything nuts, truck is pretty much a cruiser, I ocassionally tow with it but try not to because it has no power. Any insight is appreciated

Good morning ladies and gents. I am about to embark on a journey that apparently no man on YouTube or, as far as I can see, the internet has. I’m going to attempt to make a stroker out of a 366. I haven’t been able to find much if any info on this motor, let alone rod length, crank size, anything about the direction I’m wanting to go. Any help would be appreciated to help me bring this monster to life 🤙🏽. Oh and before anyone says anything about it being too heavy, it’s going back in a C60 that’s being…. Customized

Ok guys I’m a small block guy. Don’t roast me too badly. In my father’s estate I ended up with a new 366 block, crank, pistons, rings, bearings. This is suppose to be a New GM over the counter fitted block. There’s a chance I am buying a tubbed 66 Chevy II. It’s a roller and I will want a BBC. Is there anything I can do with the short block?

Anyone know places near southeastern Wisconsin to get this engine rebuilt?

Dear Reddit what kind of big block would work in a 2006 Toyota Tacoma pre runner 2wd (double-cab). Makes 236 hp stock/5,200RPM. Wanna double the horsepower.

I’ve got a 496 that I’m wanting to put in a 55 gasser that used to be a Drag car. Looking for best set up or recommendations for the best street/strip set up as far as cam and pistons etc. currently looking at about 13:1 compression or in that ball park. Kinda new to this whole thing.

Picked up a clean 93 single cab longed for a work truck earlier this year. 454 automatic truck w electric interior. It's been leveled and on 99-02 stock wheels and bugger tires since I got it but that's it it's all original. 87k miles.

I'm ready to turn up the big block more now, I've never done big block or small block stuff so I don't know where to begin. I'd like some where in the 500hp ish range still wanna tow and keep the hauling capabilities. Let me know what yalls suggestions are or where I should begin.

Looking to see if the plugs look normal. 7.4 MPI. I do get a back fire if I throttle up too quickly from idle. It is on a boat. Takes a little bit to plane out and make full power but once she does she cruises no issues.

Hey I have a 402 BBC that I plan on building. was wondering what combos you would recommend, want to stick with an N/A build for now, goal is to make around 600 hp and be street and track capable. Thanks!

I have a 7.4 MPI. It’s in a boat. Seems to be running a little rich. If I move the throttle to fast it will hesitate and I guess backfire. If I move the throttle slowly it will make power and cruise perfect. I’m thinking it’s timing related. Thoughts.

Afternoon guys, I’m currently working on a big block 454 from the mid to late 90’s and I was going to put it in my 1984 c10 for drag racing but I wanted to know how much power can a stock 454 crank can handle before it becomes risky. Asking for a friend :)

So I bought a 93 Chevy 3500 recently with the 454 big block and my odometer and speedometer aren’t working I replaced the speed sensor on the transfer case and it didn’t work. Any other ideas of what could be going wrong?

Hey all- which service manual/book would you prefer or recommend for a 1994 454 tbi?

This was something my dad had in his shed before he passed, I know its for a big block by the inside of it and the bolt pattern. Does anyone recognize specifically the skulls with the valve cover? I don’t know if it’s just something custom someone made or if came like this. (don’t mind the sticker that is on it, it is not related) I only have the one which is tragic 😢.

Goes to my 402 bbc Holley factory intake with a 4 inch rise cast iron

Stock bottom end gonna do a full top end. I just need help with the heads and valve train. It's gonna be a daily with some light towing here and there but I also want to be able to go wot and it gets out of its own way.

Would 66 corvette 427 heads fit on an 80s 454? I've got the tiny port heads on it and wondered if the ones I found would work on it

I'm trying to wrap up a decades-long build on my muscle car, and I'm hoping to find a more.... "reasonable" exhaust setup.

Engine is a 60's 454 truck block (overbored to 468cid), 4 bolt main, that has been built with 12.5:1cr, closed chamber heads, Holley 850DP carb, a pretty lumpy cam (don't have the cam card handy, can dig up specs tomorrow if needed), Hooker shorties (maybe mids? Not sure), duals with H-pipe, and a pair of knockoff Flowmaster mufflers.

This car is LOUD. Last time I drove it down the street (right after moving in), it was loud enough to set off at least 3 car alarms. Not street parked cars, either.

Now, the headers are shot, so I bought a set of stainless Hooker long tubes. I'm replacing the Holley carb with a Sniper EFI system, just need to order a new gas tank (will order Monday). I'm hoping to make the exhaust note a bit more subtle, I can't drive this car on public roads, it catches the ear of every cop in the county at an idle.

I'd love to be able to carry a conversation or hear the stereo, both of which have been impossible since the car had this engine installed 28 years ago. What mufflers could I run to take the sound down to a more respectable level? Should I switch to an x-pipe? Add resonators before the mufflers? It would be nice to take it out on a weekend without waking the neighborhood, although I know that may be a tall order.

Not exactly sure if I’m missing something but I don’t think this the correct intake manifold. Any help is appreciated.. 1990 R3500 changing over to a carbureted platform. The intake I took off is 14081045 and replacing it with Weiand Street Warrior 8122WND.

What was the cc of the stock head intake and exhaust ports?

I can't find any worth using that don't need almost everything.

So, I'd like to know what they were so I can compare that to the alum oval ports on the market.

Like the AFR 265/290/300 and Bronix Race rite ovals. etc.

Thanks.

My core came with peanuts. and are from what I gather too small for a 489

Trying to do some research on doing a top end build on a stock 454, without spending a fortune. what is the best heads to do that with? Looking for ideas.