I have a Muncie M20 that was rebuilt with unknown mileage, but inside looks GREAT (no teeth chipped, etc).

A fellow member was asking me about a trade for an early '90's 454 4-bolt main shortblock (Standard bore, 10/10 cast crank), #215 heads (stock untouched) and an aftermarket dual plane intake...

The Muncie is just a "spare", and I have two others (and only one car for them), so it wouldn't be a big deal to get rid of it (except I am a Pack-Rat).


I don't really need another engine, but the 4-bolt/standard bore interests me.

I currently have 2 454 2-bolt short blocks, a 396 long block and several 396/402 bare blocks...



While the Muncie takes up less space, I have thought of selling off my other 454s and 396s (assuming this 4-bolt block isn't cracked, etc)...


Sorry, too long...

I'd keep the muncie. getting hard to find. 454's are more plentiful

I'd keep the muncie. getting hard to find. 454's are more plentiful

I am leaning the other way, for a few reasons:
1) as I get older, my knees are aching, and I look forward to an automatic (although both current Chevelles are still sticks)

2) I tend to break things by banging gears (without letting off the gas)... As I get older, I am getting tired of having the car down. What little free time I have would be more enjoyed driving rather than wrenching. I like wrenching, but I prefer driving.

3) swapping in a 5 or 6-speed is easy, if i wanted to go manual again... Or an Autogear Muncie Supercase, etc...

The ONLY reasons I see to keep a Muncie are the lower cost (mostly because I have it already) and for "authenticity" when restoring a car to "stock".

I was looking more for a typical "value" of the swap...

What is a Muncie M20 worth? I see them alot for ~450-$550...

What is a 454 4-bolt short block worth?

What are #215 heads worth?

Will the #215 heads work with the 454 (without "custom" pistons, estimating 9.5-10.o CR)...

Thanks

Tony, I take a look at online classifieds and ebay to see what the going rates are for parts I`m looking for or selling. Right now there are 2 M20`s on the SF craigslist for $400-450. Of coarse there is another for around $650 and another for $800 but i think it includes a bellhousing and clutch. M21`s are usually alot higher. As for the 454`s, I see 2 bolt mains from $100 up to $750. 4 bolt mains usually start around $300 or so and I`ve seen them go to $1000 but the higher dollar ones usually are complete running motors.

The heads are usually around $200 or so for cores and I`ve seen ready to bolt on ones go for $250-$500.

yes the 215 heads will work on the 454 with standard shelf pistons. Speed pro has a .095" dome and it`s around 10.1 and they also have a hyper piston with a .100" dome with roughly the saem compression. They are basicaly LS5 replacement pistons.

Good luck on your decision:thumbsup: