Just been having a good look through the GMC site tonight and found a few interesting bits.
How beneficial might this be? Im tempted to get them to do it and stick in the 708's with followers etc before sending it back to me..
Heres the info:
Cylinder Heads.
GMC Head Work (TU Engines)
We open up the exhaust ports, open valve throats & narrow valve seats on inlet and exhaust. Shape port round 90-degree bend to give full flow. Valves contoured around seat area. Rebuilding with competition springs, is suggested and costs £42 extra. Head skimmed up to 2.0 mm as desired.
8v - From £450, 16v - Fropm £600
We now stock modified heads ready to fit, which means for those who wish a quick job need not wait for their head to be modified. All you do is ring us up when the head is off and we arrange for collection, when we receive it we give it a check over for serviceability and despatch the modified unit to you. In the event of a returned head being unfit for service without extra work or is scrap we will contact you to advise
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