Grand national heads on a Grand prix...

[Yarbeau]

Weird question I know.

I had an 87 GN. sold the car as a roller while the motor was out getting machined.

I have the stock heads, replaced valve guides, honed guides 0.0025 over and a valve job with new springs.

Any chance these would fit on our 3800 series? No idea personally just a feeler question if anyone has done this.

Tired of having this engine sit in my garage. block, pistons, crank, basically everything to bolt up and ride in a GN.

I'm looking at picking up an extra 02 motor and building it to swap into my 02 anniversary.

Could be interesting....

Thoughts?

[91parkave]

For the pre series one v6's they should bolt up anything after that won't especially series 2 and later why? Because series 2 and 3 have symmetrical exhaust and intake ports unlike the series one and earlier v6's you could bolt them on a series one but not 100% if the coolant holes line up on the fwd blocks

[Yarbeau]

OK makes sense. Guess everything is for sale then.

thanks for the info. I didnt think about exhuast ports.

[jteske88]

My uncle was talking about this to me recently. Ppl in the gm world run our 3800 serious block since there is so many out there. I can remember if i was pre 96 or what. I can ask and find out for you though.